I have a question....at night and most of the time period I find myself having shortness of breathe doing nothing extreme, even when I sleep sometimes at night I feel like I can t breathe and I have to sleep a certain way just to get comfortable and feel myself breathing the way I should...what is the reason for this, could it be my heart murmur , No? I m not obese, or too heavy, I m only 21 by the way!!!