im having a major panic! one of my symptoms of anxiety is shortness of breath...ive had an asthma test and it came back normal...she said it will be anxiety causing it bur sometimes if ive ran up the stairs fast etc i get like a whistle sound when i breath out...only if i take my breath right to the very end if you get me? its not loud, isnt all the time and now ive done the bad thing of looking it up and heart failure is on if the possibilities!! im not in a right panic....i dont ever find it difficult to breath or have a cough or anything. im fine when exercising. anyone else have this?