this is a stupid question...

okay so me and my boyfriend dry humped (both with underwear on). i’m on my period so i had a tampon in while doing this (day 5 our of 6). he came in my mouth later on but we humped again after he came but i made him put his shorts on. i’m on birth control too but i’ve been on an antibiotic for a rash i had. i couldn’t get pregnant right????