I am only 16 and i had unprotectes sex on friday night. He didnt ejaculate inside me but he did pre ejaculate. Ive heard you can get pregnant from this? The next day i got my period so it was the saturday and i had stomach cramps from saturday night through to sunday night worst ive ever had and ive never had it that long before. What r the chances im pregnant? Im very worried can someone please help me!!!