These are my first moments here. I posted something already, and am not sure if I did so amiss. I have not been professionally diagnosed, and have taken no tests. I have all the symptoms, however. I was exposed to fumes and dust at work, and terrible secondhand smoke from my neighbors wherever I've lived. I'm looking-in to free clinic assistance, here in Southern California. My O2 is a steady 7, resting or working out. And I just learned today it is all about CO2, and the removal of it, that causes the rest of the issues.