When anxiety is present, it is usually helpful to BREATHE---deep breath in, then with pursed lips slowly blow out. Mother had CHF and many times she would get short of breath and I taught her to do this breathing and it always helped, and now I have COPD and asthma and when I feel like there is not enough air, I do this breathing exercise. Maybe 6 times will do the trick for you. Hope this helps your chest feel lighter.. Steroid shots are not too bad, as I have had them to help with inflammation of the lungs, and they sometimes give one good energy. Get better SOON!