stressing too much orrr

messed around with a guy unprotected for like 3-4 mins... it was like 5 strokes and that was it.. he didn't ejaculate in me by no,means.. took plan b 1-2 hours later.. and this also happened on my 22% fertile day... I've been stressing app much about this. 3 days away from period and the FRER test was negative