Most of the time how I know I'm feeling bad is when I feel unusually good... Too good... Start disappearing for days at a time with no regard for my safety or wellbeing (which usually involves a lot of alcohol & drugs), I'm usually quiet edgy too... That's just the beginning of my mania. When the mania wears off & the depression comes I usually cry a lot & start to not go anywhere, lock myself in the house for days at a time. It hits everyone in different ways but I hope you're doing ok