I have been experiencing shortness of breath, tightness in the center of my chest, cold fingers and toes, night sweats. I have no congestion, doctor says my lungs are clear and I passed a stress test (on treadmill). Doctor prescribed Symbicort. I have been using it for over a month with no results. Doctor says we could try another inhaler to help, but doesn t seem to know what is causing these symptoms. YYYY@YYYY