Hi,
as you may have seen from my posts I have had a lot of bleeding problems since my M/C....
From what the doctors have told me everyone is different, and as long as you aren't still registering positive on a HPT then its not because you have any tissue left and things should settle down in time.
Also it depends on how heavy it is, mine settled down to light bleeding/spotting which i only had to wear pantyliners for, it turns out that I developed a cervical erosion during the pregnancy (perfectly normal, and quite common) and I mistook the bleeding from this, for uterine blood. If it carries on i would raise this possibility with your GP as it caused me a lot of worry and heartache until I was diagnosed.
Hope it all settles for you soon
J
XX