ear pain, sinus pressure, tingling tongue, tingling roof of mouth and pressure on roof of mouth?

my nose is NOT stuffed. but i keep getting this pressure/tightness at the bridge of my nose and ear pain that comes and goes-- when i yawn i can hear crackling, like fluid in the ear. my doctor ran some blood tests, put me on nasonex (even though no stuffiness) but my tongue feels dry and rough and tingles a lot. i also have eye flashes at times. someone said this could possibly be TMJ? i don't have bite problems that i know of. but now i am wondering...i do wear a mouth guard at night for teeth clenching. i thought this helped with any TMJ symptoms. i never thought it could be TMJ. but now i am starting to wonder if it is. the doctor said i have post nasal drip too... the weird thing is my sinuses are clear- i can breathe fine. any thoughts?