Thank you so much for your detailed post I have been experiencing mostly everything you mentioned but for a shorter time. Yes, taking B12 did help and then no more. Breathing exercises and physical activities. They all help and they don't. Sometimes I almost feel desperation. Watching Kdramas helps me sometimes, but I have to go to work. Distraction technique seems to work, but again ..not all the time. Reading the posts here gave me some hope that I should not stress beyond a certain level. I did go for test. Have mild sleep apneea and GERD is an old thing but it did not seem to bother me. Sinuses issues, yes. It seems to me that many of us here we have some issues in common, but we cannot say they triggered or cause SOB. I wish you that your symptoms will diminish. In the meantime, let's try the best we can with the breathing we have for now Fighting! ( encouragement learned from Kdramas) 😀