my dear, dear, friend. been there. done that. sorry, no t-shirt.
first, only a psychiatrist (preferably one who specializes in or does a lot of work with bp) can give you a diagnosis of bp - or, for that matter, for any mental imballance of illness. if you had diabetes would you try to diagnose yourself? why try to diagnose yourself with a possible dx of bp?
if you are dxed with bp, the main rx are mood stabelizers. i take lithium carbonate and have since 2002. i have been depressedall my life, so my pdoc added welbutrin. seems to be working. but giving someone with bp an antidepressant without a mood stabelizer is like putting nitro with glycerin - usually an explosion and not very pretty. one thing is certain wit bp: if left untreated it will ultimately lead to suicide or hospitalization. it is causded by an imballence of transmitters in the brain. it is chronic. it will nevver go away. but it can be successfully treated.
my pdoc says that my rage and anger are caused by depression. i don't know if this is a universal. they call what you are doing "ideazation" which is the step before taking positive action. i short, you may well be about to explode either on yourself (suicide) or on someone else.
the first thing you need to do is see a pdoc. perhaps your school councellor could halp with this if your parents don't know where to start. the next thing si to begin finding a "cocktail" of medications that will keep you in balance. third (or maybe first) share your rages with your parents or with your school ciouncellor. what you are dealing with is more poweerful than you are.
hope this helps.