The doctors thought I had Myasthenia Gravis since I have all of the symptoms. I don't have MG. I still have all of the symptoms. All of my controllable muscles are affected - from my eyes to my toes - especially my lungs. I feel fine sitting still but immediately upon exerting myself at any level I start gasping for air. My pulmonologist says I have the lungs of a marathon runner - even with mild to moderate COPD. Am I crazy? Could all of my symptoms be coming from COPD? Any insight offered would be appreciated.