Best Birth Control for Teens?

I really want to get birth control but my mother is completely against it. She doesn't want me to mess up my hormones (which are already out of whack) and messing around with my boyfriend. So she says there's no need for it. 
Is there any way that I could start birth control without her knowing? I'm only 16 and just started working so I don't have that much money. Also what type do you suggest for somebody in my situation? I've heard good things and bad things about each.