I mostly have this feel since last 3-4 years now that my lungs are not full. When I yawn, then it gives some satisfaction. This is leading to frequent yawns and at times I just try to yawn but unable to complete that yawn. As far as I remember this started suddenly one day. I went to 1 doctor but he said, it's just anxiety. Though I don't think that it's anxiety or psychological. I am bit overweight. I don't smoke or drink and I am vegetarian. Please suggest if any tests are required to diagnose this. Also, my lifestyle is sedentary and I am overweight @ 90kg. Height is 5 ft 8 inches. Got some tests done today. Adding the reports here