Hello, I have been following this thread off and on since my SOB started back in the spring of 2020. Seems like alot of us are experiencing the exact same symptoms. I can go days and even weeks without alot of issues then it returns just as bad. For me it will usually get worse through out the day, just depends on the day. Like many others if I don't dwell on it and am really busy at work or something to keep my mind off it. But the minute I start thinking about it it gets worse! I've been to a couple of doctors they have no answers for me. Went to the ER one morning because my anxiety got the best of me. Chest xray EKG and oxygen levels all normal. It's been so frustrating and no one understands when I try to tell them about it. I'm 48 years old and in good health. Had asthma as a kid and still have some allergies. The one thing I do have that has been strange is excessive burping. I'm on Omeprazole and don't have much acid reflux issues. But I think that the burping and SOB are some how related? It's been very frustrating last few years!