Bleeding and Blood clots after a d&c?

Okay, I had a m/c fetal demise at 7 weeks 5 days, we found out when I should have been 9 weeks. Waited 2 weeks to m/c naturally. It never happened so I had a d&c on 9/24. On 10/3 I passed a blood clot the size of my fist or a little larger, went to the ER they diagnose me with hemorrhaging. I went back into the on Tuesday 10/5. I was pretty much blown off by the doctor but demanded they repeat the scan, he agree'd and they repeated the next day. I called the doctor on Thursday to get the results and they told me I had to be seen first thing the next morning since they waited until after hours to call me back. I went in and they said there was retained tissue they needed to repeat the d&c. So on 10/9 I went back into the hospital and repeated the d&c. I have been bleeding fairly heavily ever since the first d&c, not enough for the doctors to be concerned because I am not saturating a pad every hour. I thought the bleeding was almost over, the past 3 days it has been very brown and spotty....well we just got home from Church and I passed another clot between the size of a quarter and a silver dollar. The bleeding has gone from brown back to bright red. I am supposed to have my f/u appointment on Friday. After the first d&c they found an infection in my uterus, I took the full course of antibiotics and have been feeling better physically other than the bleeding. But what is normal? And at what point should I go back to the ER or Doctor because of the blood clots or the bleeding going from brown back to bright red? I wonder when I will actually be able to move past this! Thanks for your help!