Hi there Maz,
I know how heartwrenching it is bleeding after a m/c. I didn't have any bleeding as such this pregnancy until 16 weeks when I had a fair bleed. I absolutely FREAKED!! I had a scan and everything was Fine. It was due to my placents being low lying. I had another smaller bleed at 20 weeks, but I convinced myself that it was due to the placenta again.
Havent had a thing since, placenta has moved well up, and baby is growing perfectly now!

I know what you mean about having an internal. I had an internal during my first pregnancy, and within 4 hours, started bleeding. I Lost my baby the next night and was convinced it was because of the internal. The Docs all said that there was really no way it could be... but I'm sceptical.

If you are really worried, head back to your GP and ask for a scan, or at least a blood test to show you that your HCG levels are rising. I didn't have an early scan this pregnancy, even though I had M/c'd only 2 months before... the first 16 weeks were hell!

Bleeding is very common during pregnancy. I am sure if its only a small amount, that you will be fine

Take it easy, and good luck with the rest of your pregnancy

Hugs

Nicky