I have had a bit of a cough for several days already, but I do not have yellowish phlegm; instead, clear one. The smoke of a cigarette always triggers my cough or if someone near me is smoking. Also, I think my cough is caused by too much heat in terms of weather which brings specks of dust, or when cooking something (especially when someone is sauteing). I took a tablet Cetirizine to stop my coughing, but it is still present, especially at night. Can you please tell me what I shall do to stop my coughing and feel better? Thank you.