need some sex advice!!

hey everyone! so my boyfriend and i are turning 17 soon, we have been dating for over a year and a half, and we have been talking about loosing our virginities to eachother for a while. i think that i'm ready for it, but i'm also just very nervous that i'm going to get pregnant. i'm not going to go through with it unless i know that i am 100% comfortable... but i'm just nervous that because i'm not on birth control that a condom won't be enough? does anyone have any advice or tips to help me not b nervous or calm my mental state? it's something i want but i'm nervous about pregnancy.