I had my last period on the 1st of december and had sex on the 5th and 6th which was my first time using withdrawal method. On the 7th i took the emergency pill just to be on the safe side,but endend up having sex again on the 10th. Sunday the 13th i started having cramps and begin to bleed the following day till the 17th without any symptoms, but later during the day (the 17th) i started feeling nausea and having tender breasts until the 19th. .my question is what may be the problem,is it coz of the pill i took that caused the bleeding,nausea and tender breasts or maybe am pregnant?