PLZ HELP ME, IM 17!!!!

hey girls. i’m 17 and last night, me and my boyfriend were messing around in his truck and he didn’t have any condoms. i knew it was my ovulation week but i was in the mood so i said for us to just mess around but for him to not actually put it in me... well we messed around for quite a bit (like an hour) and he kinda put it in me but not very much (idk if he did or not. it kinda felt like he did but then again it kinda didn’t) so he could have put a little pre cum in me and it’s literally my fertile window and it’s my ovulation week. i FREAKED OUT today and had him buy me a plan b pill and i took it at like 9. we were messing around at like 11 last night. what are the chances of me becoming pregnant?