I have Pcos , i only have periods on withdrawl.i did not have periods for 3 months since i dint have any medicine. a week ago i had mesprate as prescribed by doctor. i had mesprate for 5 days one dose per day. and today is the 6th day since i left mesprate. i still did not get my periods. i have got my ultrasound and urine test for pregnancy and both were negative. kindly tell me what to do. i am 20 years old.