i did my 2 day CPET test this summer. I had many problems and among them was : Ventilatory inefficiency : patient demonstrated impaired ventilation during exertion to sufficiently eliminate carbon dioxyde. Now I’ve come to accept ME, but if this is COPD, that worries me. Lately I’ve been having more dyspnea than usual. I am out of breat really easily and more often. I have to admit all my symptoms are more acute though, not just this one. But since my mom has emphyzema with only limited breathing capacity, I can’t help but wonder if this is the same thing starting with me. I have smoked occasionnally on and off for about 20 years. Sometimes years without smoking and never a heavy smoker. More of a social smoker most of the time. How can I distinguish between the two ? I’m awaiting an appointment with a specialist but it’s taking long amd I am worried. Anybody in the same situation ? Any thoughts ?