Prometrium pills heavy bleeding

Carolyn
Taking prometrium to induce periods. Two w3ks on two weeks off. After day 5 of taking it my period started and I was bleeding super heavy with big clots. This is day three of not taking it (off weeks) and day 11 of my period and it's still just as bad and heavy. Really starting to get in the way of life and I'm just really sick of it. Any one else taking prometrium or proverb that has any advise? Thanks