Going to the doctor will they tell?

okey so a few minutes ago i asked if you were allowed to go alone to get birth control from the doctor will the doctor tell your parents am 15 buh am not having i just want to be ready when ever i do because am scare because my mom got prenant at 15 had my sister at 16 i just want to be careful thats all because i dont want history to repeat it self i got alot going for mei have good grades and everything so can you guys help me please