I have had two m/c's. My first was at 6-7 weeks.
It started with heavy bleeding and bad period like pain that got worse and felt like mini contractions (bad cramping). It was very uncomfortable. It all lasted for about 7 hours. Then I passed 2 large clots. One all red and the other was a greyish, sort of skin tone colour that was rippled with red stuff attatched. Both clots were about the size of a golf ball. I then bled for about 10 days (heavy for the first few days) I am someone who only has light preiods lasting 2-3 days at the most.
Sending lots of hugs