HI, thanks for using healthcare magic
If a bacterial infection is present , it should have responded to the 2 courses of antibiotics. If your doctor still believes that your symptoms are related to an infection he can perform a throat swab and send it to the lab.
The swab would be able to determine if any bacteria is present.
A post nasal drip
would also cause sore throat
and cough. If you are experiencing this symptom, you may want to consider the use of oral antihistamines and a topical steroid nasal spray
such as nasonex, nasocort, rhinocort
, flonase, beconase.
I hope this helps