Thanks for asking the query,
According to your clinical symptoms i suspect that you have developed secondary infection in your filled tooth, which has spread to the periapical tissues leading to formation of abscess
I would suggest you to visit to the Dentist
and get the checkup done, take an x-ray of the tooth, RCT has to be performed.
Take a course of antibiotics and analgesics under the prescription of your Dentist.
Hope this helps out,