(((((DivideByZero)))))

Great nickname, btw.
Okay, well, my first question would be to ask you if you have always had this pattern of behavior/thinking since you were a child? You can replace childhood maladaptive patterns with their adult version if that helps you any. For instance, instead of turning in homework late, you pay bills late (or whatever). Were you disorganized as a child like you are now, or is this new? If it's new, I'd be concerned more about depression or something else other than ADHD, keeping in mind that whatever you think of as being stereotypically ADHD behaviors/thought processes might not be specific to ADHD alone.

ADHD has a wide variety of symptoms that can manifest itself in a billion different ways, just like most other disorders.

For instance, hyperactivity may or may not be present in someone with Attention Deficit Hyperactivity Disorder. There are three subtypes, and one subtype that is "ADHD Not Otherwise Specified" if they can't plug you into a specific subtype of ADHD. Myself, I'm the "Combined ADHD" subtype, representing equally hyperactivity and inattentive symptoms. Some are primarily the "Inattentive ADHD" subtype, and will be without dominant/codominant hyperactivity symptoms (at least overtly). Then there is the primarily "Hyperactive ADHD" subtype. You get my drift.

Do you see a psychotherapist? If not, would you like to get assessed to see what's going on? Even if it turns out that you don't have ADHD and instead it's something else, talk therapy can really be helpful. If you do have ADHD, the therapist who assesses you can refer you with a report to a medical doctor or prescribing health professional (like a Psychiatrist, a General Practitioner, or a Psychiatric Nurse Practitioner for instance) to start a trial of medicine to help with ADHD symptoms.

I really think you should look through your local listings for therapists (PhD./PsyD. preferably) who have lots of experience in assessing and treating ADULTS with ADHD. Insurance usually covers all this. Do you have insurance? Are you ready to make the next step?

I'd like to add that most adults with ADHD have a comorbid disorder of some kind at some point in their lives. The most common comorbid disorders (if I remember correctly) are anxiety disorders and depressive disorders. The likelihood of having a comorbid disorder to ADHD increases the longer the ADHD goes undetected/untreated. That's why talk therapy (not just meds) are a good idea, even if you decide to go with medication too. I see a therapist for talk therapy and I take medication for ADHD. It works well that way, especially when first diagnosed and learning to tread water with a name for what's "wrong" with you.