Persistent sore throat and ear infection despite two different antibiotics?

Sore throat: You may have a viral illness or the cause of your sore throat may have a different cause other than infectious.If pain persists see your dentist or oral surgeon.

URI: May be viral, in which case antibiotics of no value. Antibiotics may be effective in eradication of bacterial causes, but the inflammatory changes persist for lengthy time periods. Symptoms may be due to those changes including congestion which may require treatment. Rarely you may have a resistant bacterial cause, but this is quite unusual.