Problems with Family, Friends, ETC.

I have friends who seem to know a lot about mental disorders. A lot of people are telling me they think I have one. They think I'm bipolar. They also think I have something , I forgot what it's called, where you black out , not pass out, and you do stupid stuff like cut and text people you shouldn't talk to. I told my mom that id like to get checked to see and she won't take me. She thinks I'm just being a drama queen. I don't know how to figure this stuff out if I don't go to a doctor but I need my mom to take me and stuff since I am only 15. What am I supposed to do?