I'm getting scared now because before December 2020 I hardly got chest infections at all. Then I had to clean out a very dirty shed, got sick coughing up horrible thick green stuff - the Dr gave me strong antibiotics but it comes back. It's been back 5 times since and is awful. Antibiotics seem to 'stem' it for a week then back it comes sooner or later. Does anyone know why it won't go? I'm 43, don't smoke, usually healthy and now terrified!