I wasn't involved in sex but I was sleeping with my husband at night he has a night fall that completely saturated his underwear( he was in his underwear only) and I'm wearing nighty, (only one layer of cloth) we slept very closed to each other so, few drops of semen fall on lower back side of my nighty and my my periods are 3 days late, I had a mild Gramps due with white discharge, is there any possibility of pregnancy plz answer