It can be normal, but if you have any discomfort with it, do call your doctor back and demand to be seen. Spotting and bleeding do occur with miscarriage obviously, but most instances of it in 1st tri are harmless and those pregnancies go on to be perfectly healthy. With my miscarriage, I honestly only had a tiny bit of spotting (ultimately had to have a d&c 6 weeks later because literally nothing was happening), but with my daughter I had really heavy (like gushing) bleeding. It was later, around 10 weeks, but there was no obvious cause and I never had any more problems after that. I had a healthy, easy pregnancy otherwise. So it isn't always a bad thing. I think the difference really is if you have any pain or cramping with it. Cramping is also normal in early pregnancy, but I think you'll notice a difference between normal mild cramping and being in pain. If it's the latter, I would call your doctor again. Sending you positive vibes that it eases up soon and all turns out well.