My Doctor Prescribe Dicynone And Primolut N For Me,d First

My doctor prescribe dicynone and primolut N for me,d first month my period did not flow well and lasted for 8 days against d normal 4to 5days and I did not use sanitary pad d whole of 8days its lasted but dis month Av seen my period and I suppose to Av seen it on d 21 st of July .pls advice on why to do.I did PT test today it was negative