I had unprotected sex Friday Oct. 10th twice. On Sunday afternoon Oct 12th I took plan B. Later that night around 10pm we had sex again (foolishly) and he did not pull out and no protection was used. On Oct.17th five days after taking the plan B I woke up cramping and bleeding- today is the 20th and the bleeding has stopped. The last day of my last period was Oct. 7th or 8th... so I shouldnt be expecting my period until early November... what are the chances I could be pregnant?