Maybe 2 weeks early, maybe missed miscarriage

Desiree

So I just went to my 1st appointment. They think I may only be 6 weeks instead of 8, so I have to come back in 2 weeks because my sac was empty. If it's still empty then it means I have a missed miscarriage.

They're actually the second Dr to ask if sure about how far along I am. And a third Dr said he was worried about levels cause they seemed low for being 8 weeks, but then they started to pick up, so hopefully I'm just not as far as the app thought I was. I'm just so scared. This is my first pregnancy, I just announced it yesterday.

Has anyone has this happen, or anything similar to this?