Why is consistent irritation in right side of throat, ear, neck and some times spikes in right side of head ?

Last year I got removed bottom last tooth of right side and it was very painful. Dentist took almost 3 hours to remove this by pc by pc. Now I have mild tooth decay in 2nd last tooth in the upper jaw of right side. Due to this i have a irritation in right side of ear and some times spikes in right side of my head and always throat irritation on right side.
I went to dentist, ENT specilist and a phisician and done ENT endospoce as well as stomach endoscope, but nothing found. Even I have done MRI scanning of my head and neck , nothing found. I am having this problem since 1 year. Any body knows the solution please help.