I had very, VERY light bleeding today and went to the docs to get it checked out. They did an ultrasound , they saw the sac and it was where it was supposed to be and said it looked normal but they couldn't see a baby in it. I'm only 6 weeks 4 days along. Is it normal to not see the baby? I have to go back in three days to get my HCG levels tested to determine if I'm having a miscarriage or not....