He way you are describing your symptoms and pain it looks that AZITHROMYCIN
may prove to be in adequate for the control of infection.
It would be better to start AUGMENTIN
625 mg 8 hourly for 5 to 7 days along with IBUPROFEN
600 mg three times a day.It should be able to control your infection.
If you don't improve,then you might have to consult a dentist
,get X -rayed and clear the infected area.