Pain near nose after dental procedure

Hello All

I got root canal done on the inside of  upper teeth(3rd from the front) . aftei got the dental crowns on the 3rd and fourth upper  teeth.

The general dentist in order to adjust the cap, put pressure by his hands to adjust the cap and also told me to clench the teeth for a minute which i did by putting the pressure on the cap with my lower teeth.

after that when i used to eat, the teeth used to knock  each other and within a week i realize that when iam yawing or putting some pressure on my cheeks (near to nose),  there is a pain which used to travel downwards from cheeks towards the upper teeth .

it has been 2 months and whenever i put some  little pressure on the cheeks neare to nose i can sense something is not right and i get a bit of pain.

i have shown to another genral dentist(most poular in our area) and he says the root canal and crowns are ok and he told me to start massging  on my cheeks.

i did not do the massage fearing some worst cud happen.

pls someone can guide as to what has happened and to whom should i show  (neurologist, general physian or to whom) to cure my self ?

regds
sonu