When were you sick? March 2020 here and while cognitively I have been ok, my heart and lungs are all messed up. Four years, three primary doctors, five cardiologists, over a dozen tests and still no real answers. I tested as borderline COPD, given an inhaler and my lung tests improved dramatically, well into healthy range. However even with the inhaler I still get that "air hunger" sensation and the feeling like I cannot get a full breath in.

Oddly I got COVID this past July and most of my heart/lung symptoms disappeared the day before being sick, and did not return until a week or two after I recovered. I have heard this before in the LC community going back years.