I'd had a chronic cough since January. I was diagnosed with walking pneumonia back then. No chest X-ray. Nor on the follow up 2 weeks later. The cough never went away but I was recovering my strengh and back on the bicycle trying to get my form back for mountain bike racing. I could tell my form was off, but attributed it to being sick for almost the entire month of January. Cough got worse recently so I went back to the doctor to have it checked out. THIS time my Dr. ordered an X-Ray. The rest is history.