I have had both a natural m/c and a D&C. With the natural m/c (I was 6 weeks) I had bleeding for a few days and a few clots but not alot. I only started bleeding on the Friday night and had a scan Saturday morning and nothing could be seen. I think it may depend on how far along you were and everyone's body reacts differently.
With the D&C I had a little bleeding straight afterwards and then spotting for the rest of the day and absolutely nothing since. I did have intense pain (contractions for about 6 hours) 3 days afterwards but I didn't have any bleeding at all.
I think it also depends if your Dr managed to remove all the tissue (sounds so awful to say

). I spoke to my ob yesterday and he seemed very pleased I hadn't had a lot of bleeding.
I hope this all stops for you soon