Have you been to the doctor yet? In some cases, miscarriage can not only cause some damage, but can leave tissues behind that can cause infection, necrosis, septicemia, etc. A doctor will be able to tell you if everything went out in the miscarriage or not...though either way, it is a traumatic experience for your body (and, in most cases, mind as well), so it will take time to heal.
I cannot imagine being a woman and all, and everything they must go through. Yes, the advice given here is wise. Talk to your doctor about this situation. I wish you the best and I am very sorry to read about your miscarriage. I keep you in my prayers and hope that you will be healthy once again.