i’m terrified

so like two days ago me and my boyfriend sorta had sex for the first time. he didn’t put it in all the way and he did not cum in me but he just “went in” like 3 times. we both got caught in the moment and stopped right after bc we knew we couldn’t do it unprotected. i know how u can get pregnant from precum so it’s kinda scary.. my brother and his girlfriend both say that there’s a very very little chance that i will get pregnant but you know.. it’s scary. i just need some support so don’t hate!