My Boyfriend And I Were Fooling Around A While Back,

My boyfriend and I were fooling around a while back, both fully clothed Both had underwear and pants on (he had a pair of sweats and I leggings). My boyfriend ejaculated, and I too had womanly fluids. I'm a virgin and this is my first encounter with something like this. Could I possibly get pregnant from this? My period is 4 days late and I'm concerned. Is it possible for sperm to go through four layers of clothing? Even if clothing is moist? I've never had a delay with my menstrual cycle either so that adds to my concerns as well. Please help!