Have pcos doctor gave me provera (medroxyprogesterone) for 10days and birth control to regulate my period but i have heavy bleeding for 2 1/2 weeks now. what is happening?

Withdrawal bleeding: Hi, Typically Provera (medroxyprogesterone) (progesterone) given to help get a menses started if you haven't had one in a awhile. You take the progesterone for 7-10 days and when you have finished, as the progesterone levels drop, it signals your body to shed the lining of your uterus ( ie. have a menses). If you haven't had a period in awhile before doing this treatment , then the menses that occurs can be heavy.