Birth control

I’m 14 and I just got out of a relationship with a 17 year old. My parents think that I’m more sexually active now. And I mean I am a little. But I have SUPPPEERR heavy periods and horrible back pain. Sometimes it’s to where I can’t even move. I just started my period yesterday and just a few minutes ago I bled through a super plus tampon in 1 hour. I want to try birth control to see if it will stop my period or make it at least lighter and release some of the pain. Any suggestions on how I should ask because I feel like they will yell at me if I ask and tell me I’m not ready to be having sex even though it’s for my period. Please help. I’m dying over here😂😭😭😥😥😰