This has happened to me...though admittedly not for a while. I had a really bad spell where I passed out and ended up with a sprained wrist on to of everything else back near the beginning. But I have grown so accustomed to the pain now that it hasn't done this for a while.

However...when the pain gets really bad I can get dizzy and nauseous (sometimes so bad I even throw up). My boyfriend says that I get a very distinct "green" look to me when the pain is really bad. So even though I no longer pass out from the pain I still am affected by it when it gets that bad. And of coutse it takes a lot out of me too so I am very fatugued, have a hard time concentrating, and can't hardly think straight. And my heatrt rate is also now constantly at a high level because of the constant pain. I would imagine we are all affected differenctly by the pain.

I'm sure you've spoken to the doctors about this, but if not it is always good to check with them to make sure there is nothing else going on.