Take 2-4000 mg of Vit C every 4 hrs until it stops. (You will get diarrhea, but its worth it) Also take 600 mg of Magnesium which is a smooth muscle relaxer which will calm your bronchial tubes.
f you would like to try 30 ml of Black cuмin Seed oil (not pills) 3 times a day it is very helpful for breathing. It does taste terrible though