Doctors have a saying, "if you are standing on a plain in colorado and you hear hoof beats, dont turn around expecting to see zebras.
" there are so many other conditions which are more common that i would suspect to cause a cough
. Infections like colds and bronchitis when coughing for a week to a month. Asthma
or chronic bronchitis
when months to years. Others can be found with xrays etc.