what it sounds like to me is vasomotor rhinitis. Swollen turbinates- do you have post nasal drainage, thicker type down the back of your throat? I had about 50,000 dollars worth of testing also. Allergy tests, shots. mri's, sweat test, every test you can think of -all negative. Nasal steroid sprays, nasal rinses, oral steroids. I am so sick of these tests and expense and then i hear "vasomotor rhinitis" --NO CURE for this.