I had period from 9-14 october and 20 i had unprotected sex and 21 i have taken i pill. On 27th i gt bleeding which lasted for 5 days. It was different from my normal period as it is dark brown in color and much lighter than my normal period. also there is no pain during this bleeding. However during my normal period, my first day is extremely painful. I am expecting next period on 4th november. Today is 7 th november and i have not received my period. the bleeding which i have received on 27th was my period or it was a side effect of pill?