She goes to the vet today at 2:15 (my time, so 9:15GMT). Please think happy thoughts that she doesn't need anything horrible and, worst case, this was a phantom pregnancy.

I like my vet, but the fellow who answered the phone has me a little distressed. He tried to tell me the average gestation for cats is 60 days and at the outside, 63, so she's probably not pregnant at all, so don't bother to bring her in. When I recounted all of her behaviors and symptoms, then he started to worry the kittens are dead . So, off she goes. I pray it's all ok.