Hi, I've been having (what seems to be) menstrual cramps but no period for around 4 days now. It has been 1 week since last having unprotected sex and 2 weeks since I first had unprotected sex. I'm also experiencing fatigue and feeling weak. I'm not sure if my period is missed because of its irregularity, but the fact that i'm having cramps tells me my period should be coming on when its not. Could this be due to stress? Or could I be pregnant?