i am a relatively healthy 28 yr old, ive never had an issue until about a week ago, i started to pull shallow breaths, like my lungs were expanding, but im not getting air...its only gotten worse, ive tried stretching,deep breaths, etc..(now when i work out, i actually lose my breath,wheezy...never been like that....its continuing even now and im starting to develop a sharp pain directly in my sternum. am i being paranoid, or is there something that might cause a restriction here?