I am having a very severe cough problem from the past 1.5 week. Once i start coughing it is like an attack and lasts about 10-15 min at a stretch. It grows in the night and i can't sleep, it is like i will vomit from it. My throat and body aches from coughing all the time. It starts generally when around some dust or smoke or pollution. Cough syrups are also not showing any improvements. The cough is very sticky and tight. Help.