Hi,this is Aindrila from bangalore.My periods are irregular very mush,it last happened at May 2011,after that it didn't happen,i have tested pregnancy for 3 times,last tested yesterday only,its negative and also i dont have any family planning now,i took deviry 10mg 6 tablets for 2 days,still its not coming,previously it happened on january 2011,but after i went to doctor,she gave me deviry 10 mg same dose,and then periods came also,but this time its not coming,can u kindly tell me why its happening?