breath, take slow relaxed breaths, maybe lie down, dont fight it, if it seems to get better then take a nap and see if when you wake up you dont feel fine, but if that doesnt work, or it get any worse, then defiantly go see what wrong with you, im going today and i get to tell him i smoke cigarettes, and weed! yayA!
The best thing to do when you feel like the throat is closing up is not to tense as it makes it constrict further. Since there are several causes of throat close ups, it is important to see a doctor to identify the actual cause.
go to the hospital. If its an allergic reaction you could stop breathing. you will need an epipen shot. It it's terribly bad, call an ambulance and say you need a shot. Whichever way will get you help the quickest. If you need and can, taking a few Benadryl MAY buy you a few minutes