Finding Birth Control

Hi everyone. I am having friends with benefits sex with a guy at my school and our only protection is condoms. I want another method of some sort, but I'm only 15 and I haven't even started to drive. I have a bad relationship with my mother and she likes having the maximum amount of control over my life and I don't want her to be able to dictate my birth conrtol choices, so I can't use her insurance. I'm not old enough to have a job to pay for my own birth control never mind even getting to a Planned Parenthood alone. What are my options here?