Stop all drug intake a lot of doctors will not diagnoses you with bipolar if you have used recently. Tell your parents you need to go to the doctors and get a complete check up including blood work. Start taking a multi vitamin and try to get to sleep by 11, even on week ends sorry. Ask your parents to see a clinical psychologist, they can't prescribe medications in most state but can diagnose. They will tell you if medication may help you.

Don't expect a diagnosis of bipolar as a child/teen currently kids are being diagnosed with mood disorder nos because mental illness evolves in children as hormones and the brain changes. That doesn't mean you wont be treated with bipolar drugs just you'll have a more flexible diagnosis.

As horrifyingly scary as it is be completely honest and say EVERYTHING to your doctors answer there questions in as much detail as possible. The more information they have the better they can help. Even if you think they'll say "this person is seriously in sain." They've heard way worse and if you are designated as a "crisis" it's not a bad thing there are several programs to treat kids. Be completely honest about your drug usage they can't tell your parents. The only time that confidentiality can be broken is if the therapist feel you can not keep yourself from causing great physical harm to yourself or others. Usually this does not include self harm, sex or drugs but ask your therapist about their policy at intake. Here's the thing if a therapist feels your parents should know something s/he may encourage you to talk to your parents with or without them. My son has called me into his therapists office so that his therapist could tell me things he just couldn't voice.

As for weather you have bipolar or not. It's possible but realize either way you need help. You have a history of eating disorder,self mutilation, drug use (not to be confused with abuse), promiscuity, history of suicide, bouts of paranoia, and mood fluctuations that are all effecting you physical and mental health. Try not to put a label to the issue. If your completely open and honest they'll give you a label themselves. Welcome to the board.