I went to the doctor for my athletes foot and persistent cough. He put me on Penicillin for my athletes foot because the skin was broken and ordered a CT scan for my chest. Four weeks later I had the CT scan and he just called saying I have a chest infection and should have penicillin. I reminded him that I just got off a round of penicillin so he asked if m cough was gone. I said it was gone before the CT scan. He said good. Now I m wondering what did the CT scan really show? Do I have cancer or something? 70 years old, exercise about 45 min a day walking etc. I have mild asthma which flares up when I eat peanuts, etc.