You can get the antibiotic for tooth infections from veterinary online stores.
Probably too late for you.
Something people should consider though.
There’s no discomfort, not even cold sensitive, and I’m hitting it with peroxide base mouthrinse every few hours. Hopefully my regular dentist will call back tomorrow morning, if not, will try others - should be able to get at least an antibiotic prescription from my Dr. if need be, tomorrow, plus the temporary “cement”, tomorrow too.