My period ended a week ago, had unprotected sex at night for a few seconds then used a condom. SO the next morning I bought the morning after pill. Took it before I didn't have any problems but when I took the pill last week, I began to bleed heavy early yesterday morning and still bleeding heavier today. Also when I take a deep breath or laugh I have bad lower back pains and cramps as if I were running for a long time. Should I go to the hospital?