Went today for an ultrasound and according to my last period I should be 6w1d. According to the ultrasound I was 5w2d and they only saw the sac. Dr said it might be a few days to early to see baby and yolk based on their dating and that I might just not be as far along as I thought depending on when I ovulated and since sperm can live 5 days before conceiving. She drew blood and is going to call back today with the results. I'm so nervous after my miscarriage in early September.