question: I have a head cold and am very congested in my chest. My doctor gave me some antibiotic pills, but it didn t help. I was feeling out of breath easily. I started feeling better, but still have some what of a head cold, my chest is not as congested. I still have yellowish mucus from my nose and chest. I am a smoker, but have cut down a lot. My doctor gave me some cough medicine, it helps; but at night i wake up coughing my head off, should I be concerned of more serious problems of my lungs or is it a virus that is hard to get rid of?