Missy,
*HUGS*
Thats how my m/c was. I was about 6 weeks and then I got dark blood and then heavy red blood with clots - but I had very very bad cramps - so much so that I was doubled over in pain.
I also had lots of bleeding in this preg and now Bella is 8 weeks old. I would go to your doctor and see if they can shed some light.
HTH
Kate