Any advice of what helps against depression?? Or at least to keep it less intense and manageable? ( without triggering mania )

Two weeks ago, while also feeling miserable, I took some saint John's wort supplement and that made me (what I think) hypomanic ( agitated, energetic, incredibly productive (finished like two huge university papers in two days!) social, happy...) for like two weeks, last night I started feeling anxious and guilty and then today I'm so indecisive and heavy I haven't even left the house yet and it's like 1 pm. I'm on a three month waiting list for evaluation and I'd like to know how I can manage this without giving up on university or just stay in bed all day, without taking more SJW and risking making it worse. Or could that be an ok temporary solution? To take them like once every tenth day to keep me high? Not sure that would work but maybe? Anything else that helps? Omega 3 pills? Exercise? Don't know? Thanks

C