My boyfriend and i have had sex a few times before my period and during it and we don't use any birth control or condoms. My period just ended a few days ago and my breasts are extremely sensitive, I've been getting nauseous everyday but don't actually throw up. I've also been having some mucus coming out of my vagina. My headaches are constant and so are my cramps and I'm not sure what's going on. Is it possible that i could be pregnant though i just had a somewhat strange period. Btw it wasn't late but shorter and lighter then my normal periods. Anyone got any help?