sounds like panic attacks. you may not think things are affecting you when they happen but that's why your body reacts that way. Stress is a killer..go to doc. the can prescribe something that should take care of this.
I do like salt but dont crave it, I dont think LOL
Check for hyponatremia, it sounds like potential symptoms of hypoadrenalism. Do you crave sodium at all?
Possible allergy I get similar and have been like it several months now, I do have a low Vit D count,but the supplements make me worse, I have sinisitus and a dry cough .I think mine is allergies more than anything, they do a lot of aerial spaying in CA and I hear that may also be a cause .