frist time sex so paranoid please help

so i had sex last night and it was good and all but now i’m nervous as fuck.

he wore a condom and i stopped him like halfway through cause it was starting to not be enjoyable anymore. i would say he got like 20 strokes and obvi there was no cum.

could i get pregnant like this? i started birth control 2 weeks ago so i know there’s a chance my period won’t come when it’s supposed to since my body is getting used to it so now i’m nervous about this

please help