I took plan b 2 hours after having unprotected sex and I am not sure of the guy finished inside of me. He pulled out and when he did he finished as he pulled out. he wiped himself off and put it back in for a few minutes until I told him to take it out after I found out. I have irregular periods and my last period was about 2 weeks before the intercourse. I don't know if I was ovulating. Should I be worried that the pill didn't work? It has been about 4 or 5 days since I took the pill.