Possible mouth pain ~ one month after dental??

Toffee had a dental about 3 weeks ago and is due for his followup, so he was going in to the vet in the next few days. He had antibiotics after the dental but not any longer. He had several teeth pulled and a few resorptive lesions dealt with too.

Quite suddenly last night, he was not wanting to eat his soft food - mouth seems sore when I try to look inside and he seemed mildly agitated (but able to walk around and such). So I am thinking that it is connected to his mouth. He won't eat his regular soft food (and presumably he is not eating his hard food either). But I just blended his soft food and he gulped down a healthy sized portion so he is hungry and he does want to eat. But he licks his mouth a lot after eating.

I booked an appointment for today as soon as I could, so he is seeing his vet. But of course I have to wait until this afternoon to take him in (not an emergency so will wait for regular vet who starts her shift this afternoon). I am worried as we all are in such situations. It does sound like perhaps some infection following after the dental perhaps? Quite surprising as he did very well right after the dental.

Has anyone else had issues several weeks after dental with infections or such things? It might not be his mouth, but everything is pointing to this.

If he had an incisor removed and not the matching one, the matching one may not be lining up right.  It may be on the gum rather then over it.  I know that's the main thing that the vet checked on one of my cats when she went in for her followup after extractions.

I wonder what they can do about it if things are not lined up well. I cannot remember which teeth he had pulled, but one canine and I do think an incisor too perhaps. Could the gum just be infected then? Presumably antibiotics but I wonder what would happen next.

How did they deal with the resorptive lesions?  They are usually progressive and usually cause a lot of pain for the cat.  That could be what is causing the pain.  A lot of times vets will just extract these teeth.  Sometimes they try to restore them, but often they progress and cause pain for the cat.

I cannot remember if they were able to pull the resorptive lesions, or had to file them down if too much resorption had occurred to pull. We did not attempt to restore them. I wonder if they have to saw them down and sew up, if there can still be some pain as the final resorption takes place.

Good news is that he is GOBBLING up the blended food, so this seems to suggest it is not something else more internal etc. I sure wish kitties could talk at times like this and tell us what is hurting.

Appointment is for mid-afternoon today. He seems ok enough until then since he has eaten a really good amount of the blended food (basically all that I offer, he will eat - he probably had slowed down his eating the past few days but not enough for me to notice so he is hungry for the blended food) and he is lying down on the bed with his friends.