Hello @diomit and welcome to Mayo Clinic Connect. After reading your history, it is clear that this has greatly impacted your health and you are motivated to find answers. I know you said you don't believe this to be originating in your lungs, however, the shortness of breath is a thread that connects you to many members who are also experiencing shortness of breath, so you will notice that I have moved your post in order to allow you all to better connect.

Members such as @gabrielm @tahiristan @amber1234 and @hard2breathe all have been recent contributors and may have experiences they can share with you.

Do you happen to feel more/less ability to breath when breathing in through your nose or mouth? Is there a difference?