does anyone else here get this? sometimes i just cannot take a deep breath, it's as if my diaphragm has ceased up and refuses to let me. it's horrible, i can feel panic starting, thinking i'm never going to be able to breathe properly again, and i have to take lots of little shallow breaths.. then a couple of minutes later i feel something relax, and once again i can take a very welcome deep breath.
when it's 'ceased up' i can't yawn either.
weird. :(