When I completely stress out, I actually can kick off an asthma attack...it's a bummer, especially if dodo here doesn't have an inhaler with her! So, I've found that various meditative breathing techniques (Pranayama) really help. This is from www.babyzone.com, but the url pops up so many ads, I'm just copying in the text:

"Ujjayi, or "ocean breathing," is another valuable breathing practice. It calms the mind and promotes concentration........ To practice, sit comfortably with your spine straight (or lie down on your back). Begin drawing in deep, long, slow breaths through your nose. Gently contract the back of your throat, creating a steady hissing sound as you breath in and out (think of Darth Vadar -- this is similar to the sound you are trying to emulate). Slowly lengthen your inhalation and exhalation as much as possible while concentrating on dispelling any tension within your body. Your breath should be constant and smooth."

I find this Ocean Breathing helps me to relax. The first few times you do it, you can get pretty light headed, so be careful not to pass out!! Then you'd have a whole nudder set of problems! :-) Take care.

Emmy