I would feel better if I was on the pill but am I too young?

I'm 15 and I've never had sexual relations but I am getting older and would feel more comfortable if I was on the pill or, had some type of birth control. I know that there is no reason for me to need it right now but, if something was to happen I'd want to have protection! I've been considering asking my mom but, she's kind of protective and I worry that she'd get mad and I'd get it trouble for asking. I have sent pictures before (yes I know terrible decision!!) and my mom found out so I worry that if I asked for birth control she'd freak out but, I'd rather be safe than sorry if I ever decided to have sex. What should I do?