MaraLyn, I hope you are doing good.
It dose not sound like t.n. to me but it could be pre t.n.
the fact that crying has to be present while chewing or clamping down doesn't really fit the symptoms. but I AM NOT A DOC . the pains from t.n. would surely be unforgettable and would make me bring it up for sure.
T.M.J. or sinus would be my guess.
do you grind your teeth at night?
let us know how things have been going for you.I notice this is a few months old.
PEACE
BMW