So yesterday my boyfriend came over and we passed the night together... i was sitting on top of him when he ejaculated i didn't realize it until i found out that my pants and my underwear were really wet so i cleaned up myself and in the morning i went to the pharmacy and bought a pill that will make my ovulation late but i am still really afraid of becoming pregnant cause i was on 5th day of my fertility window with 27% of falling pregnant...

So is it possible that i fall pregnant without penetration and in these conditions?