Severe throat pain while swallowing food and even saliva can happen due to a strong throat infection, tonsillitis, viral illness, ulcers, acid reflux, or sometimes swelling around the throat area. If you have already used Cefixime with clavulanic acid and Azithromycin without improvement, it is important not to keep changing or repeating antibiotics on your own because the exact cause may not be bacterial. Try to take warm fluids, soft foods, and warm salt water gargles several times a day to reduce irritation. Avoid spicy food, smoking, alcohol, and very cold drinks for now because they may worsen the pain. Rest and proper hydration are also important while the throat heals. Pain relief medicines should only be used after proper medical advice, especially if symptoms are severe. Please consult a doctor, especially if you develop fever, breathing difficulty, swelling in the neck, white patches, inability to swallow properly, or symptoms lasting for many days.