Hi I was suffering big time too all the symptoms you named off. Including the yawing and shortness of breath. I got to the bottom of it. I went to see countless specialists with no answers. Until I met my gastroenterologist. At first I had serious doubts my breathing was a result of my gut. But it was! My Pulmonary doctor to treat it by exercise. I could barley walk 20 yards with out being winded. I didn’t believe him at first. But now I am living proof we can get through this. I exercise 1 hour a day now and cut out all my meds except for omeprazol. I feel great physically and the shortness of breath has gone away. I have other health issues but nothing related to this topic. Keep your faith and be strong and don’t give up hope.