Hi,my period ended on the 28th of September,I had unprotected sex on that same day and took contraceptives afterwards.on the 3rd of October,I started bleeding again,this lasted till the 5th of October.Although it wasn t as heavy as my period.at first I thought it was spotting because I had read about it happening before pregnancy.i went to the hospital,got a scan,my doctor then gave me Primolut N and said it will correct the hormonal imbalance.i took it for 3days.i was expecting my period on the 22nd from my normal calculations.i have taken several pregnancy tests,they are all negative,but I still haven t gotten my period.i am starting to get really worried.any suggestions?