Ok here is the link to the website I was on about regarding the hyperventilation and magnesium thing.

www.drmyhill.co.uk/index.cfm

You will see list at left hand side choose - breathing problems

Then it will give you a choice - choose - Hyperventilation (makes you feel as if you can't get your breath)

This will explain about the magnesium thing.

Hope that helps <img src="/ubbthreads/images/graemlins/smirk.gif" alt="" />lizbet