I'm sorry you've had such a difficult time. It would probably be good to tell your parents that you think you may be having some emotional troubles beyond OCD and pulling out your hair. You've described what sounds very much like an eating disorder and maybe you do have other mental health issues, like BPD or NPD. You sound very self-aware and that's a plus for you because it means you can describe how you think, feel and act to a therapist. That can aid diagnosis.

Maybe your parents will help you see a psychologist or psychotherapist. I wish you the best.