I think most people with breathing difficulties are diagnosed with COPD first.
Its like saying Ford motor car. As there are many different models of the Ford motor car, there are different models of COPD if you like.
COLD: Chronic obstructive lung disease.
COAD: Chronic obstructive airway disease.
CAL: Chronic Airflow Limitation.
CORD: Chronic obstructive respiratory disease.
If you google each one of them, you will probably find one that is a "best fit" for you.
Although they are pretty similar.
Bottom line is our lungs are screwed. Keith