The bleeding after I had DS was shocking. Stop, Start, heavy, light, massive clots, red, brown, black you name it I had it and It was all over the place.
I had a heamorrage with Zeke though so I was closely monitored after her was born. I know if it is bright red, fresh blood for 24 hours or so (after you have had brown blood) you should see a dr.
Have you had any bad cramping?