question: Hello doctor, I have been suffering from breathing issues for about two months. At that time, I was coming off Duloxetine HCl. I was also having weird headaches, but that has subsided. I have been to several doctors and had blood work, oxygen level test and pulmonary test. Everything came back normal. With my breathing, I have the constant urge to take a deep breath in hopes of getting that satisfying deep sigh. I am constantly thinking about my breathing, even when I sleep. I am still able to exercise vigorously, run long distances, etc., with no problems. My fear is that I am experiencing diaphragm weakness as a result of something neurological. Here are my questions. I have been placed on anxiety medicines, which have helped to keep me sane. What is your expert opinion? Does this sound like diaphragm weakness? Would I be able to exercise vigorously if my breathing muscles were weakening?