I'm in a similar spot as you: history of depression and anxiety never diagnosed with bipolar. But lookng back I've had a few spells where even though my anxiety was unpleasant, there were times that the physically heightened sensations from the adrenaline rush felt very good. I have had similar too where my spouse has had to pull me away from a several hours long art session in the middle of the night to get to bed!! Especially because in between these possible hypomanias, I actually have excessive fatigue (not from depression, the depressive symptoms are well in remission.) I'm going to bring my husband's concerns to my next psych visit.