why do you even think you have "bipolar disorder"? it is a construct. i'm not saying this to dismiss your moods, which i believe are real - i say this as someone who had severe mental health issues due to childhood abuse, but is now a married, employed, homeowning adult with no medication. i had real issues, but worked my way through it. you can't frame your experiences in a medicalized way and expect to solve the problem. many others have been down this path and found the same answer.
taper your meds slowly, one by one. study mindfulness/CBT and reframe the way you experience down times, and the way you react to up times. you have/should seek to have total control of your reactions, and when you don't, forgive yourself and do better tomorrow. build your life skills up one by one. prioritize nutrition, exercise, hygiene, sleep, social contact, and productive work. one at a time. seek stable and positive influences and people, and put yourself in situations that stimulate new pathways in your brain. i can't tell you exactly what to do or how to do it - trust your instincts in the healing process for what to focus on when. rest, cry, think too hard for a weekend if you need to, but always come back to reality.
read ivan illych's "medical nemesis", robert anton wilson "prometheus rising", "the brain that changes itself", and anything by r.d. laing - study the psychology and neuroscience deeply. read joseph campbell's work on mythology, shamanism and schizophrenia (which used to be the kitchen sink name for almost all mental disorder).
use anti-inflammatories like ibuprofen within reason, as well as nutritional medicine (high quantities of fruit/veg in smoothies, liver and other high quality animal foods, fasting) and known, powerful ancient medicines like turmeric, frankincense and black cumin oil - mental illness has an inflammatory component that current-gen psychiatric drugs are not addressing. look up "neuroinflammation" and follow any search strings that relate to your issues.
it's likely that your brain has matured a lot from the age of 15, even with the medication. you can have more perspective on things now. none of it is the end of the world.
in particular, keep perspective on the political issues you read about. it may be interesting, but focus your energies on yourself while you are recovering. the difference between a person who correctly intuits that jews run everything and a schizophrenic is (a) who they choose to reveal this to and (b) how much importance they put on this fact as their life deteriorates around them. it's true, but give this knowledge its proper place in your life.
best of luck.