The Pill

So i’m going to be 15 in january and i really want to go on the pill soon. I understand that i’m really young and everything but my period cramps are absolutely horrible and i really want to know if birth control would help. Me and my mom have talked about it but she always seems to frown upon the idea and i feel like if i were to talk to my doctor about it first then talk to my mom with my doctor she would get upset and say no. Any advise?