Had a cough for almost 3 weeks (a cold for the first 10 days too, chills, loss of appetite, etc), cough seemed to be getting better then yesterday I had really bad chest and back pain so went to the walk in centre. Chest is clear, must be muscle pain. My cough was getting better, now last night/this morning I am just coughing non stop. It's relentless. Would you be concerned that it's getting worse after almost 3 weeks? I don't really know what I expect to happen being as I was checked over yesterday. Just wondering if anyone else has had similar I guess.