It certainly sounds like she could have an abcess which has become infected. You should always have an after-hours number for your dentist. If you describe the symptoms to him, he should be able to send a prescripton to your pharmacy for antibiotics which are the only thing which alleviate the problem and reduce the swelling. Until the swelling reduces he won't be able to actually do anything. And the antibiotics may well fix the problem. I know about this as I've had the problem recently and the dental practice that I had been going to had changed hands and I didn't know who to phone - had to suffer an entire weekend. What I subsequently discovered from the new dentist is that pharmacists can prescribe low doses of antibiotics - not enough, perhaps, to fix the problem, but it might help prevent things getting worse. I know how scary it can be to have this and wondering what's going to happen when you don't know who to call. Just warn your wife that since she is probably trying to fight an infection, her body is working very hard, and she may find that she feels incredibly tired for a few days even after going onto antibiotics. Anyway, see if you can find a pharmacy that is still open. She will probably also need an anti-inflammatory like Brufin. The generics are fairly cheap.
39 mths ago