Maybe the vet is confused as to what dog they are talking about
I would be looking for a new vet if they couldn't keep them straight.. that is their job.
Glad you are taking her in, I would have him do a swab to make sure she isn't infected .. I would probably also make an appointment to have...
Have you had her to the vet lately, like in this week? I would be RUNNING my girl to the vet, if she was that far along, and then she didn't look pregnant, you could run into pyo and all sorts of female reproductive issues if there is a dead, or dying pups in there.. PLEASE take her in and have...