Your behavior reminds me of the way I behaved when I was 14-15, completely out of control. I'm bipolar type 2.
My advice to you is to ask people around you to keep an eye on your behavior, cos it's usually pretty hard to tell in the moment if you're being manic or depressed - it clouds up our perspective.
Ask your psychiatrist for the SCID-II test. And note that bipolars can (and do) have more diagnoses than just bipolar disorder. The diagnose you should focus on is 'depression'. If you experience mania (which I'd say that you do, based on what you described), then 'depression' isn't sufficient.
I was diagnosed with winter depression, teen depression and normal depression before I was diagnosed with bipolar disorder. And I too behaved the way you do.

Anyway, there are criterias for what defines a major depressive episode, a manic episode and a hypomanic episode - and pretty strict criterias for the different type diagnoses. I don't think a lot of people are aware of the DSM-IV criterias for the episodes. Bipolar disorder isn't just about having dramatic mood swings or behaving in a certain way, it's not that simple.

Alternatives to bipolar disorder are cyclocthymic disorder and borderline personality disorder. The latter is pretty much exactly like bipolar disorder, with the difference that borderlines cycle a lot more often than bipolars. A bipolar with rapid cycling will cycle 3-4 times in a year.. yeah that's considered RAPID. I usually only have 2 cycles per year, the hypomanic ones last the shortest.
One cycle can last as long as 9 months. Cycling several times in one week is known as 'mixed state', if you've experienced a manic episode in addition to that - bipolar type 1 sounds about right.
For me I might cycle more frequently when I'm going from one episode to another. "More frequently" means that I'll be hypomanic for a couple days, then depressed for two weeks, then a couple days of hypomania, maybe some baseline in there as well, then either full-blown hypomania or depression. I can spend 1-2 months cycling like that before my brain makes up its mind.

If you cycle every day, or every week, or several times per week (and haven't met the criterias for a manic episode in addition) - I'd put my bet on borderline personality disorder.
BP also shares characteristics with schizofrenia and ADHD. It's a tough job diagnosing a bipolar, so they don't take it lightly - they won't throw the word "bipolar" around unless they're confident that it's the right diagnose. Diagnosing someone with bipolar disorder is like diagnosing someone with cancer - so psychiatrists are careful with that.

My cycles this year:
January-March (continuance from November 2007): Hypomanic
March-September: Depressed and chronic suicidal
September-October: Baseline/hypomanic due to new medication (doesn't count as a cycle when it's caused by medication)
October-December: Hypomania peaking
My medication suppresses my depression so much that I doubt I'll ever fully feel a depressive episode again, but I can feel the difference between when my hypomania is peaking and when I'm just acting "normal" due to medication treating my depression.

Criteria for bipolar type 1: Needs to have had one or more manic or mixed episodes without a major depressive episode (though it occurs, it's not needed for diagnose)
Bipolar type 2: Needs to have had at least one major depressive episode, followed by hypomanic episodes - no manic or mixed episodes.

Manic episode:
A) A distinct period of abnormally and persistently elevated, expansive or irritable mood, lasting at least 1 week (or any duration if hospitalization is necessary)
B) During the period of mood disturbance, three (or more) of the following symptoms have persisted (four if the mood is only irritable) and have been present to a significant degree:
1) inflated self-esteem or grandiosity
2) decreased need for sleep (e.g., feels rested after only 3 hours of sleep)
3) more talkative than usual or pressure to keep talking
4) flight of ideas or subjective experience that thoughts are racing
5) distractibility (i.e., attention too easily drawn to unimportant or irrelevant external stimuli)
6) increase in goal-directed activity (at work, at school, or sexually) or psychomotor agitation
7) excessive involvement in pleasurable activities that have a high potential for painful consequences (e.g., engaging in unrestrained buying sprees, sexual indiscretions, or foolish business investments)
C) The symptoms do not meet criteria for a Mixed Episode
D) The mood disturbance is sufficiently severe to cause marked impairment in occupational functioning or in usual social activities or relationships with others, or to necessitate hospitalization to prevent harm to self or others, or there are psychotic features.
E) The symptoms are not due to the direct physiological effects of a substance (e.g., a drug of abuse, a medication or other treatment) or a general medical condition (e.g., hyperthyroidism)

Hypomanic episode:
A) A distinct period of persistently elevated, expansive or irritable mood, lasting throughout at least 4 days, that is clearly different from the usual nondepressed mood.
B) During the period of mood disturbance, three (or more) of the following symptoms have persisted (four if the mood is only irritable) and have been present to a significant degree:
1) inflated self-esteem or grandiosity
2) decreased need for sleep (e.g., feels rested after only 3 hours of sleep)
3) more talkative than usual or pressure to keep talking
4) flight of ideas or subjective experience that thoughts are racing
5) distractibility (i.e., attention too easily drawn to unimportant or irrelevant external stimuli)
6) increase in goal-directed activity (at work, at school, or sexually) or psychomotor agitation
7) excessive involvement in pleasurable activities that have a high potential for painful consequences (e.g., engaging in unrestrained buying sprees, sexual indiscretions, or foolish business investments)
C) The episode is associated with an unequivocal change in functioning that is uncharacteristic of the person when not symptomatic.
D) The disturbance in mood and the change in functioning are observable by others.
E) The mood disturbance not severe enough to cause marked impairment in social or occupational functioning, or to necessitate hospitalization, and there are no psychotic features.
F) The symptoms are not due to the direct physiological effects of a substance (e.g., a drug of abuse, a medication or other treatment) or a general medical condition (e.g., hyperthyroidism)

Major depressive episode:
A) Five (or more) of the following symptoms have been present during the same 2-week period and represent a change from previous functioning; at least one of the symptoms is either (1) depressed mood or (2) loss of interest or pleasure
Note: Do not include symptoms that are clearly due to a general medical condition, or mood-incongruent delusions or hallucinations
1) depressed mood most of the day, nearly every day, as indicated by either subjective report (e.g., feels sad or empty) or observation made by others (e.g., appears tearful). Note: In children and adolescents, can be irritable mood.
2) markedly diminished interest or pleasure in all, or almost all, activities most of the day, nearly every day (as indicated by either subjective account or observation made by others)
3) significant weight loss when not dieting or weight gain (e.g., a change of more than 5% of body weight in a month), or decrease or increase in appetite nearly every day. Note: In children, consider failure to make expected weight gains.
4) insomnia or hypersomnia nearly every day
5) psychomotor agitation or retardation nearly every day (observable by others, not merely subjective feelings of restlessness or being slowed down)
6) fatigue or loss of energy nearly every day
7) feelings of worthlessness or excessive or inappropriate guilt (which may be delusional) nearly every day (not merely self-reproach or guilt about being sick)
8) diminished ability to think or concentrate, or indecisiveness, nearly every day (either by subjective account or as observed by others)
9) recurrent thoughts of death (not just fear of dying), recurrent suicidal ideation without a specific plan, or a suicide attempt or a specific plan for committing suicide
B) The symptoms do not meet criteria for a Mixed Episode
C) The symptoms cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.
D) The symptoms are not due to the direct physiological effects of a substance (e.g., a drug of abuse, a medication) or a general medical condition (e.g., hypothyroidism)
E) The symptoms are not better accounted for by Bereavement, i.e., after the loss of a loved one, the symptoms persist for longer than 2 months or are characterized by marked functional impairment, morbid preoccupation with worthlessness, suicidal ideation, psychotic symptoms, or psychomotor retardation.

Mixed episode:
(Note: this is often referred to as "rapidly cycling bipolar" - but technically Rapid Cycling refers to at least 4 episodes in the previous 12 months that meet criteria for a Major Depressive, Manic, Mixed or Hypomanic Episode, and the Episodes are demarcated either by partial or full remission for at least 2 months or a switch to an episode of opposite polarity - e.g., Major Depressive Episode to Manic Episode)

A. The criteria are met both for a Manic Episode and for a Major Depressive Episode (except for duration) nearly every day during at least a 1-week period.
B. The mood disturbance is sufficiently severe to cause marked impairment in occupational functioning or in usual social activities or relationships with others, or to necessitate hospitalization to prevent harm to self or others, or there are psychotic features.
C. The symptoms are not due to the direct physiological effects of a substance (e.g., a drug of abuse, a medication, or other treatment), or a general medical condition (e.g., hyperthyroidism)

Long post, but maybe it helped - you as well as others. A lot of people seem to think that they have bipolar disorder, but the majority of them don't know what the disorder really is about; and most of them probably have borderline personality disorder, not bipolar disorder. Don't get me wrong, I'm not saying that you DON'T have bipolar disorder. Just take a look at your behavior from now on (and in retrospect), keeping a journal is a good idea, and "map" your cycles. There are some websites designed for that purpose, I don't remember the urls right now but just google and you'll find them.