my last period was on dec. 1, and I was projected to ovulate around dec. 14. I believe my boyfriend and I had unprotected sex about 3 days before that but as I have terrible memory I'm unsure about the exact date. my boyfriend pulls out but I'm concerned about pre-ejaculate. my period was supposed to arrive on the 28th, but it is now the 31st, and I'm beginning to freak out. I had had my normal pms symptoms starting about a week before my period was supposed to begin: cramping, moodiness, and my breasts were really sore. but all of that's normal. I still have those three symptoms, yet no period. i have been stressed out lately about school, and now thinking of how my mom will react IF in fact I am pregnant, has put me through a few nervous breakdowns. I'm stressed about being pregnant. so am I pregnant, or is it a stress-induced late period?