How can I stop coughing?

I’ve been coughing for the past half hour non-stop. My chest is on fire and there seems to be no end to it. I’ve tried drinking and eating mints. I took medicine, but it continues on. It a bronchitis sounding cough and it shakes my entire body all the way down to my feet. Is there any breathing exercises I could do? I suppose I could try fresh air but it’s almost dark out. How can I make it stop?