benn, I don't know where you live, or how your primary care physician determined that your COPD isn't bad enough to see a pulmonologist. You are 64 so you will be eligible for Medicare soon….. get to a pulmonologist, get a lung function test done. Your bouts with pneumonia scare me. You have done two great things…. quit smoking and started a good exercise regiment. Have you been checked for Alpha 1… it is, and I am one, a genetic condition. You can be tested for free…. go to alpha1.org. It is a 1 in 2500 chance, but worth the effort, especially for your family if you are tested positive. I am not a medical professional in any way, but am a COPD ALPHA1 patient, will turn 70 in OCT, have a wonderful pulmonologist at Mayo, in Rochester MN, am on three different nebulizer medicines, on 2L O2 at night, and on a antibiotic. At about 25 EVERYONES pulmonary function decreases, when you quit smoking you returned to a healthy slope of decay, just at a lower level…. so it is important to know where you started. Good Luck and keep up the good work.