How to get on birth control

I'm 16 and sexually active and I want to get on birth control, but I'm afraid of talking to my mom about. My bf is 18, so I'm afraid of her reaction if I told her I'm having sex with him. I've read somewhere about how you can get on BC without parental permission and I'm curious if anyone on here has gotten on BC without their parents knowing, and how they were able to. Any advice for BC would be appreciated, thanks.