hi...last month i had periods two times with the gap between them of 10 days..when i was having my periods second time i consulted a gynecologist..she took a pregnancy test first..it came back negative..then she prescribed Primolut N twice a day for 21 days.. 2-3 days after i started to take the tablets, bleeding stopped..now its around 11 days since im taking Primolut N but todays i m having slight spotting...im very regular in taking the tablets..what may be the reason of this spotting even when im taking the tablets?? plz help..Thanks in advance