Well, what would you do if it was your tooth and hurting?????
Of course you need to call the dentist. #1 concern. He can get an infection in it and that infection can get into his blood stream and go to his brain and he'll die!
A friend of mine, who's dad is a pastor of a little country church, had a family in that congregation lose a little boy last year to a tooth infection.
He needs medical care.
Can you call the dentist's office to see if there is an after hours phone number to call? Can you call your pediatrician and ask for some antibiotics?
Is there a Children's Hospital in your area? Do they have dentists going to college there to become dentists? At O U Health Science Center in OKC they have a full dental college on the campus. So if there is a dental emergency they often have access to a dentist 24 hours per day. That's why I'm asking. Is there a medical campus nearby? With teaching hospitals? They could get more results.
Your child is suffering and his other teeth may be just as bad as this one inside. He needs an emergency visit to the dentist today or the ER so he can at least get some antibiotics to prevent infection.