Zinc lozenges may help. There are sugar-free versions. Also, make sure you drink lots of water, warm or cold, depending on what feels better on your throat. Honey is supposed to be soothing for the throat, too, but with yeast issues, I wouldn't do that if I were you. My Husband likes the numbing lozenges that have menthol in them when he gets a sore throat.
I've never gotten a sore throat as a result of taking antibiotics.
I hope you feel better soon - take care,
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Pancytopenia, chronic malabsorption/malnutrition, etc.; G-Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Heparin (to flush PICC line), Claritin, Colloidal Silver (used topically), IV Milk Thistle, probiotics.