blighted ova
Yes, unfortunately they are quite common. As for the mis-diagnosis...not often :( I know that's not what you want to hear. I have had 2. Both times, I was praying for it to be a mis-diagnosis. They weren't. But, keep the faith, you might be that one special one!! I will keep my fingers crossed for you!!
got pregnant last April and had the full run of symptoms, at my 11 appt when they did the ultrasound there was nothing there, blighted ovum. My body hadn't caught on and I had to have a D&E. Good news is was given the go ahead to TTC in July and got pregnant in August with a completly healthy little girl.