I did dry humping with my significant other, I was on my period, 3rd day (i have a 29 day cycle), I had three clothing articles and a pad on (a legging and 2 undies) he ejaculated on my leggings and I had stains on my leggings. When I checked my inner underwear was a little bit wet. However, I do not know whether the pad was on proper place or not, if the pad moved it would have been from the upper side. Can this cause pregnancy. Can sperm swim through 3 clothing articles?