It is strange to think that a normal bodily function can be anxiety provoking. It's really important to learn to breathe efficiently. I just learned on Monday that I have asthma, and since Monday I've been thinking a lot about how to change my breathing habits. As soon as you notice yourself chest breathing, switch to diaphragm breathing. Also, for those of you who workout, this will promote a more efficient workout. I feel like I'm out of breath quickly when I run because I've been a chest breather instead of a diaphragm breather.