Urgent help needed with coughing!?

I've had this very bad cough since Monday, and it's getting worse everytime, i am constantly coughing, i barely sleep, and everytime i cough it's for a really long time and i start choking because i can't breathe, my chest feels heavy and i have difficulty breathing, do you know anything i can do to make it go away? It really doesn't stop, i'm desperate, thanks in advance!
Urgent help needed with coughing!?
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