I'm a very paranoid person. Me and my boyfriend always fool around, and about 3 weeks ago I gave him oral, I'm not sure if sperm got on his hands or mine during the encounter. After that we dry humped with underwear on and there was no ejaculation. Anyways, I got my "period" on Saturday.(it was 3 days late) It's now Wednesday (5 days) and my period never lasts this long. It's heavy and a lot of clots as well. I know prolonged periods mean you could be pregnant, but is that really possible? Please let me know :(