First of all I acknowledge you for being self aware enough at 15 to know you need some type of help. My issues have been present since elementary but i didnt see it.

Try to convince your mom to take you to the doctor. Explain your concerns in detail. Ask her to let the doctor make the decision. Of course meds are a big concern, but sometimes they are warranted. Therapy can also go a long way. Untreated mental illnesses (or health) tend to get worse untreated.

Best wishes.