To discuss a sore throat I've had despite antibiotic treatment?

Viral vs .... Post nasal drainage vs acid reflux. Each has a different treatment. If you have a history of allergies start taking an over the counter antihistamine. If you have reflux avoid spicy and acidic foods and consider a stomach acid blocking pill (PPI) or Tums for episodic relief.
Viral? It may be viral. Drink lots of fluids, take lozenges, take ibuprofen. Best of luck.