Hi Merry, thanks for your response! My head ct scan did not show anything out of the ordinary. I actually started on omeprozole for a few weeks before going on pantoprazole, but maybe something else would be better. I did see a pulmonologist and they did note some sort of obstruction, but they told me it was likely asthma and gave me an inhaler, which has not helped. I continue to experience the shortness of breath even when sitting there doing nothing. I have a followup with the pulmonologist next week so maybe that will help. My primary care returned my call and basically said the next step would be to get a second opinion. I am at a loss... Side note - one of my cowoerkers suggested genetic testing and I mentioned it to my doctor as a diagnostic tool but she did not seem enthusiastic about it. Any thoughts? Someone else mentioned mitochondrial disease. Any thoughts on that? I googled it and it sounds like me, but at this point EVERYTHING sounds like me.