Most doctors will not do ultrasounds this early in pregnancy for this exact reason. But mine did. I thought that maybe I'd be in that small lucky percentage of women who would already be able to see the baby and the baby's heartbeat in the 5th week and I would get some of the reassurance I'm so desperately searching for. I'm not sure what delusional force came over me that made me think I could be "lucky." Not me. Not anymore. They did see a sac, but nothing in it. It's too early to diagnose a "blighted ovum," so I have to go back in 2 weeks for another ultrasound. Plenty of women have this happen early in their pregnancies and go on to have perfectly healthy babies... or at least that's what I keep telling myself.
Patience.... I must have patience.