I ve had a chest cold for 3 days. I had a fever but it went away. Now I have a persistent cough that ends in a rattling in my chest and feels unproductive. Is this just the course of the chest cold? I had a small section of my lung cut out a year ago Sept because I had a suspicious node and they thought it was lung cancer. Fortunately it wasn t but they never figured out what it was, just some kind of fungus. That s why I worry.