I seem to have a hormone imbalance because I started to bleed for more than the stipulated period for a menstural cycle my Doc recommended progyluton and it worked while I was on it but when I stopped the bleeding started back for more than seven days during the menstrual cycle. So I started taking evening primrose oil 1300mg and that worked until I ran out for 2 weeks then my menstrual cycle started and I am still bleeding for more than seven days. What I would like to know is how long can you take progyluton ? and what are the serious side effects