hi.. i had unprotected sex with my bf but i was on the pill. i found out the pills were out of date. i had small bleeding about a week after. i have stomach cramps the night b4 i my period and i was 3 days late. my period was different, it was heavier than usual and lasted 4 days. i have been feeling sick a few times since and had stomach cramps again tonight. is it a sign of a miscarrige?