Three weeks ago i got a cold my cough never went away but turned into a dry cough now its wet again i had a clear chest stay lung cancer?

Prob not: Best thing to do is see your doctor if your cough will not go away, doubt it is cancer

Cough.: While I wouldn’t think cancer first and foremost in this context, I do think you have something that requires more investigation as there may be a simple treatment option for you. This could just be allergies. Or maybe a bacterial infection.