Hi, i work as a fitness instructor and am usually pretty healthy but over the past few months i have become increasingly short of breath throughout the day, even doing simple tasks like eating and picking up my children has left me short of breath, i also have been experiencing pins and needles in my mouth and face and this is really effecting my day to day life as well as my job in a gym. I have had blood tests and a chest xray which my doctor said were fine and gave me an inhaler but this is not helping. I would really appreciate any advice!