So I had unprotected sex on the 1st of October which was the 4th day of my period but it was almost ending. It was sudden so I took an emergency pill just in case. Today is exactly a month after and my period is 6 days late, I have been having a dull abdominal ache for almost 3 days and some very dark drown discharge for the past 4/5 days. Is this normal?... I can very confused and scared.