I was diagnosed bipolar 1, then undiagnosed to mood disorder unspecified, so it's definitely possible to shake it off.

But what you wrote does sound bipolar. I have no doubt it was made worse by the drugs and stress you've been through, though. I think most mood disorders have a seasonal element to them (feel better in spring like you mentioned), too.

BUT...it's always a possibility it could be something else. I have a history of head injuries, bizarre thoughts irrespective of mood, and various symptoms of personality disorders, so I'm going to have a full neuropsych eval (4 hours) and some type of brain imaging done to rule out tumors, lesions, epilepsy, and other organic problems.