@Dechi If your dyspnea responds to treatments for anxiety, that is one plausible answer, but what if it does not? I've already seen "air hunger" caused by antibodies to N-type calcium channels misdiagnosed as anxiety, and that is only one example. Frankly, suffocation is a great way to induce panic, as happens with waterboarding. It works both ways: anxiety => dyspnea, dyspnea => anxiety. Try to deal with the anxiety however you best can, but if these all fail, ask for tests of less common causes.