I haven't had an ultrasound yet, but my doctor is thinking I'm going to miscarry because my hcg level isn't doubling like it's suppose to. It increased, but only a little. I was told to expect more bleeding, but it's been three days and everything is the same. I hope everything turns out ok for you. I see my doctor Thursday so I'm hoping for good news.
Is it possible you're not as far along? That could be why the development isn't what seven weeks should look like.
I went for a scan a few years back and there was no feral pole but everything else went back a week later there was a fetal pole.
I was told that I was going to miscarry as well. Turns out, baby was just too small still (too early to tell) I'd get a second and third opinion. We did, and I'm now almost 24 weeks. Good luck, and I hope everything is ok