Bronchitis, pneumonia or just a cold?

hi just about a week and a half ago, I thought I was coming down with a cold, until I lost my voice and kept coughing more and more. I went to the doctor and he said that it appear to be a viral infection, close to bronchitis but not quite. I took some ontibiotics, drank plenty of flouids and recovered from it about a week later, I was feeling very good for a few days. I decided to go to the gym and after my normal workout routine, I went to the sauna for about 15 mnts. Well it was a little bit cold outside, about 14 degrees. Now a day later I find myself coughing again, I mean I just can't stop coughing. Is this bronchitis now or pneumonia or just cold again?