Thanks but I am not asking for a prescription, just similar experiences and insight from people with COPD/asthma.
I have a COPD (emphysema), as you do not mention covid in it"s many flavours, as I have never contacted that I cant comment.
Short of breath can be a mix and match of various problems mostly from bad circulation, which causes the heart to beat faster if you are over weight. It get's tothe stage when the heart beat gets right up in to 150bpm and the spo2 drops to around 50% to 60% mark. This is when I go into AFib .
I now have what is called home oxgen here, with a oxgen concentrator in my bedroom and three oxgen bottles for emergencies (power failures, etc). I have these set on 1.5 to 2.0 litres per minute which I have settled on over the past wo years of use to keep AFib under control when needed.
Home oxgen takes some getting here as you have to meet certain criteria, after echo cardiograms, CT scans, wearing a Halter heart monitor for 24 hours, and lastly the 5 minute walk stress test to see how far you can walk /stagger between to set poinrs on the wall.
This is done over two days one aftert yuo have been on oxygen for 24 hours, the next day when you have no oxygen for the same period of time. When all things are put together and you have some luck you may get it, plus $700.00 off of your power bill each year.
It took six years for me to finally get it, and it has made a big difference in my life.
Edit: typo