8w US showing yolk sac, fetal pole, but no baby.

Alicia
I went in for my first appt today and the us only showed a yolk sac and fetal pole. She said it looked like I was measuring 5w3d, in which case I wouldn't have even been pregnant by the time I had a positive test. Anyone else have a similar experience? I have a follow up appointment next Tuesday but I'm feeling hopeless.