My doctor told me that I'm about 4-6 weeks pregnant. She couldn't give me a for sure estimate. Well she gave me an ultrasound and said that she couldn't see a heart beat. And thought I might be having a miscarriage. She also saw little flecks I guess, and a little bit of blood. I did some research and I found that some women don't see a heart beat until their like 8-10 weeks pregnant. My mother didn't see a heart beat with any of her kids untill she was about 9 weeks pregnant. And she's had 5 kids lol! Is there someway that my doctor might be mistaken?