I have chronic obstructive pulmonary disease, what to do?

COPD: First need to confirm diagnosis to exclude asthma. At your age seems more likely. Need to exclude Alpha 1 antitrypsin deficiency that could cause emphysema at a young age. This has specific treatment. In regards on what to do, STOP SMOKING if a smoker. Need to determine severity with pulmonary function tests and depending on severity, and symptoms, various treatment options are available.