can i get pregnant?

so i had sex for the 1st time on wednesday night and we didn’t use a condom, but he didn’t cum cause i was freaking out over not having a condom. can i get pregnant even if he didn’t cum. i would buy plan b but i can’t cause i’m 16 and you have to be 18 and i have no one who can buy it for me. i can’t tell my parents because i will literally get kicked out and have no place to go. i’m not also on any birth control because i wasn’t dating him and it was unexpected.