Too young for BC

I'm 15, and want to be put on BC to help with menstrual pains. They weren't too bad until at least 4 months ago but now my parents think it's because I want to become sexually active with my bf. While I feel I'm ready, we both have decided to wait. They think I'm too young and "birth control fucks you up". Is there a way I can bring it up to them and talk with them about it?