I am a 28 yr old female,married, 5'4" height with a history of very irregular menstruation. I have been taking OCP's for a year to regularize my menstruation. If I stop taking, periods will not come. 3months now, I tried to stop taking OCP's, as expected my monthly period didn't come I consulted myself and doctor gave me Primolut N 5mg 3x a day for 5 days. I also subjected myself for pregnancy test using a home pregnancy kit and it was negative before I started using Primolut N. How long will I wait for my period to come after taking this medicine? thanks!