Need more information like your do you have fever? Are you producing any sputum? Is the chest pain only during cough or is it there otherwise as well? Also is it more at night or day or same all time. If you dont have any symptoms likely to some viral infection or allergy and some antihistamine like citrizine should help. If you have other symptoms that I have asked need to see doctor immediately and may need some tests like blood test and chest X ray to further plan