Greetings  I too have had problems with depression - anxiety; never got diagnosed or searched for prescription medication as I was an avid psychedelic user. So I can't help with the bi polar issue or the medication issue; but what I can tell you is if the molecule is calling you, there is a reason. What is your experience with psychedelic substances? I wouldn't suggest ayahuasca until you have became comfortable with the molecule; but in low doses aya can be very calm and it can get you familiar with the journey it provides. I honestly can say as a 19 year I overcame mental illnesses that were holding me back through psychedelic exploration, and I also believe the most medicinal like substance I've came across was definitely Dmt.