how to get birth control

I am 16 and just started having sex with my boyfriend but we didn't use any protection the first 4 times but he pulled out so I don't think there was any problems. But now I am scared because if I got pregnant my life would be over but my parents would also kill me for even asking to go on the pill. Is there any way to get birth control from your doctor or anywhere without your parents for sure ever finding out?