I didnt have a D&C the doctors said i had had a completed miscarriage and the procedure wasnt needed. They did have to keep teack of me to make sure i wasnt having an ectopic pregnancy.I have heard that is extremely painful. I dont think i had as much pain as your describing, though dont get me wrong it did hurt! I want to say i bled for a little over a week. I had normal periods the 3 months after my miscarriage, but the fourth month i didnt even have one. That was a let down cause i thought i was pregnant. I guess it can take awhile for your cycle to figure itsself out.
My best of luck to you
And remember, you know your body, if something feels wrong keep on those doctors, they work FOR YOU!
Take care
Sam