Birth Control

so ive decided that i want to be on birth control FOR MY PERIOD. I've only had sex once and it was recent. I am 15 years old and ive done my homework on differnt types of birth control but cant seem to figure out which one i want. my mom is strict when it comes to boys so she doesnt want me going and having sex and doing things so she doesnt really like the idea of birth control. my periods are really heavy and i usually bleed through everything my first few days.. what would be the best form of birth control that my mom wouldnt have a problem with .. and please tell me why it would be a good idea to get that one