help?

I'm 14 and I have really bad period cramps. I've tried everything to soothe them. Hot water bottles leave rashes on my stomach and don't help at all, hot baths do nothing, pain killers don't work. I have to have days off of school sometimes because I'm in so much pain. And it stops me doing things I need to do like looking after my animals and homework. So, should I ask my mom if I can go on birth control? I can't deal with this pain every month anymore.