I was wearing tight cotton shorts and underwear. He was in his boxers. And well, we started kinda grinding and essentially he was between my legs... i got all wet. basically sex with clothes on. he did not come. When we stopped, we realized he had a dime sized spot of precum on his boxers.

note: he also peed like an hour before we did this. this i know reduces sperm present in precum.

I'm worried that since his penis was near my vagina (even if i was wearing clothes) i could get preggers. Could anyone advise me as to what to do? Plan B?

my periods is due in like 13 days. according to my calendar, i finished ovulating 2-3 days ago.