i am married and i had taken duphaston for periods regularity but after 7 days medication of duphaston there are no menses 4 days have passed,,,what could be the possibility??my doctor prescribed it coz i had diagnosed pco ,,after taking duphaston she said u will bleed and on 2nd day of menstrual cycle u have to take lezra bt i didnt bleed yet now,,what could be the possibility?? ,reply soon