Composite filling week later pressure pain. went back, stated high filling, filed down-antibiotics to be safe, now mild cheek swelling less pain?

Possible infection: See your dentist. IF you are begining to get swelling then the decay might have been close to the pulp of the tooth. If not then the filling still may be "high" and require some more adjustment the tooth is inflamed. Make sure to have your dentist check the tooth again for you

Antibiotics ?: Either the tooth is vital or non-vital. If it is vital there is no infection. If your dentist suspects an infection, then the tooth probably needs root canal therapy. Check for vitality.

See a dentist ASAP: A tooth abscess won't go away without treatment and the infection may spread to your jaw, cheeks, sinus and to other areas of your head and neck. A dental abscess is a collection of pus that forms in your teeth or gums as a result of a bacterial infection. Dentist will treat a tooth abscess by treating the cause and getting rid of the infection. See your dentist ASAP.