greenbeing, I'm so sorry
I also agree that it's normal to have some cramping. You're body is contracting to pass the baby. Miscarriage is very unique to every woman. Some may have very little discomfort. Some may find the cramping very painful.
In most cases you can complete a miscarriage naturally without medical intervention. As christymama mentioned there are a few things to look for. If you're wetting more than one pad an hour, the cramping is more than you can talk through, high feaver and any other signs of infection. Again, most women don't end up needing further medical assistance, but you want to be in-tune with your body right now. Don't be afraid to call your midwife or doctor with any questions.
Make sure you're taking care of yourself. Keeping hydrated and resting often.
I wish you some peace.