Turns out she is fine, which is a relief. She was given a low-level antibiotics (just in case) and I have to give her some antihistimines for the next two weeks.
Turns out she is missing a tooth, though. The gum is long-healed, so who knows when or how she lost it.
I was pleased when the vet said that she is a "perfect" weight, as The Husband has been pretty sure she's overweight. She's 13 pounds, which is pretty average for being a Ragdoll. She was as good as could be at the vet's, and everyone commented on how even-tempered she is, which I found hilarious.