hey, I have been complaining from shortness of breath for about a month. I had heart check-up and lung x rays and they all come back good. I have been examined as panic attacks and I have been taking panic medicine for more than 2 weeks. I am still the same and still can't catch proper breath especially in the hot weather. I need to sit up to catch a good breath. Sometimes when I breathe I feel as if something is floating inside the left side of my upper tummy. I do not have the same feeling when I sleep though! I would appreciate your answer.