Could be substance/medication induced bipolar, or like others have suggested, borderline PD. I was misdiagnosed with BPD and given prozac, which sent me into two mixed episodes, one with psychotic features. Only difference is my first two manic episodes occurred unmedicated for me. For BP II, you need to experience hypomania for at least 4 days, unless psychotic features are present or you get hospitalized. Then hypomania crashes into depression, and the stats on BP II are that most people with it are depressed most of the time, which is why the DSM-V no longer considers BP II as a "less severe form of BP." The very treatment resistant depression causes major work and social problems. Do you have alternating bouts of depression with your suspected hypomania/mania? How long are these episodes lasting? I'd definitely get a second opinion if you don't feel right about the one you got. I had neuropsychs tell me I had BP I, now my psychiatrist tells me that he disagrees and I have BP II. It really comes down to how different clinicians are interpreting the diagnostic criteria, which unfortunately IS left up to some open interpretation, especially if any other comorbid dx exist (I have PTSD, MDD, and PMDD, though i now question the PMDD as maybe just being hypomania... but it's way dampened during my depressive episodes, so it gets really hard to tell...PMDD when not depressed is an amazing *****). I wish you the best and hope you can find a good pdoc you can trust and have an open dialog with.