Do see if you can get into your vet. The painful tooth could be delivering bacteria into the bloodstream, damaging the organs. If abcessed, a pet could even loose an eye. Call your vet and find out if they are an AAHA accredited hospital. They may be able to help you out (if you qualify) with this fund:

AAHA Helping Pets Fund

Some hospitals have their own funds as well, so ask about that. Another option is Care Credit which will give you a no interest line of credit to be paid montly for a speicified time frame.


Info on Cats and Dental Disease:
Periodontal Disease in Cats