Congratulations! We really like to get the word out though that a blighted ovum should not be diagnosed before nine weeks. There are just too many reasons a baby might not be seen (i.e. retroverted uterus, dates, etc...). You were just too early. Once a yolk sac is visualized, the doctor should wait a week to verify because many times the baby may just be too small to be seen yet which was the case for you. Your doctor really should have reassured you more so you wouldn't have worried so.
Thank you so much for the update and moving you to the Misdiagnosed Stories forum
I hope you keep us updated on your pregnancy.