These things are clearly disturbing you, which means they should probably be treated. Can you talk to a school counselor without telling your parents? Or maybe just a really good friend? Or even here, if it helps. Remember, we can't diagnose you; we can just offer support. Also keep in mind that cases of bipolar in teens are very hard to diagnose anyway, so even if you get your parents on your side, you might not get a diagnoses right off.
Also, would your parents be willing to let you do therapy? Many teens with or without mental illnesses see therapists. I'm not sure if that would work, but if you remove what right now is self diagnoses, they might be more willing to help.