I'm so sorry that you are going through this. I just miscarried last week, over the weekend. I felt very sad and disappointed and angry when I found out that I was going to miscarry. I have a great friend/therapist who really helped me come to terms with what was happening, it was really helpful to talk to someone who was caring and objective and really listened to my fears and my pain, it may help you too.
About the physical part of it, the bleeding, my doctor told me to expect bleeding, probably heavier than a regular period, and if I was bleeding so much that I would soak through a regular pad in an hour to go to emergency. For me it was a very sad time while I was bleeding, and the first day was very painful, lots of cramps, but I did not overbleed, and now 1 week since I started bleeding I think i'm actually ovulating. I am ready to try again right away, but if you aren't then don't give yourself the time you need to grieve the loss of your child.
I hope you are doing okay