I was taking Premarin.03 for 3 weeks, then told to take a 1/2 a tablet daily for one week of Apo-Medroxy for Menophause, now it is nearly finished with 1 more pill to take and I have started mt period, but I also have low Iron, and was on IV Iron Infusions 1 a week for 4 hours x 3 weeks,,,,my question is how come I am starting my period again ? is it the pills or the low Iron