I am 46, three very healthy pregnancies, no medical problems. Had an induction on August 25th, I was 19 weeks pregnant, no amniotic fluid, baby-potters. I kept bleeding for weeks, lost some tissue, went to see the doctor after the bleeding did not stop, they did an office D&C 14 days ago, still bleeding, went to see them yesterday, they said the U/S shows a very thin lining, and gave me an estrodial patch, I am not bleeding heavily, about a pad an hour. How long should it take for the estrogen to work, how do I know how much bleeding is too much?