15 and birth control

I'm in a situation where my boyfriend and I wouldn't be opposed to having sex if the time was right but there's a couple of things preventing it. one, I'm a virgin who's never even given a blowjob and two, my mom won't let me get on birth control. I mainly want the birth control to take care of my period because I go to a summer camp and sometimes don't have access to bathrooms which is a nightmare on my period. she is fully aware of this hut says that it will affect my fertility. I don't mind that cause if I have low fertility, I'll just adopt in the future. any tips on how to talk to or persuade her on this?