Recurrent throat and ear pain. Do.

Three weeks ago i had a moderate pain in my throat and ear. I visited a ent surgeon who advised for a sinus surgery. I undergo the surgery, but as soon as the medication stopped, i have started feeling pain and dryness in the left corner of my throat, the pain sometimes goes into the upper and lower jaw too. The pain sometimes occur inside the ear and sometimes at the base of the ear. I have completed the prescribed course of antibiotics and anti allergic  but still there is no respite. The pain seems to be dull and emanates from the left side of the throat below the Adam's apple. The dryness usually increases on the left side of the throat. And it feels as if something is lodged there. I am also experiencing drooling at night. Please tell me what i should do.