I am 22 years old, not trying to get pregnant. I asked my doctor to prescribe medicine for pcos to have regular periods- she gave me susten 300. I had susten 300 in october- around 15th for 3 days and I got my periods. I did?t take the medicine in november. I took susten from around 29th november and already had the 10 medicines prescribed- I am still not getting my periods. It?s been 2 weeks since I had sex, the results are also negative. I need to know why am I not having periods even after taking susten.