This sounds really disturbing. Um, have you gone to a Gp and had the usually culprits checked out? Tried a saline solution spray (like the ones they sell to use when you have colds and stuff)? If it doesn't turn anything up, he should refer you up to a NET specialist, and then further. make sure that all the somatic stuff is cleared before they start assuming it's all, well, in your head (ouch, since that's where your nose is).
Have you had this before? How long have you had it? Has it started coming on in bouts that get steadily longer? Does one person in your grouping get it more than the others? This is stuff you might want to check out and write down before you go see someone. Good luck, Elsium! HUUUUGGGGSSSSS!