Have you ever passed out from period cramp pain?

Over the years, I've had several times where my cramps have gotten so bad that I pour sweat and pass out. I always feel it coming, so I lay down so I don't get injured. It only ever has happened at work and once at school in high school - no major strenuous activity, just normal stuff, but never at home. Everything "down there" is normal, I've gone to several doctors trying to sort these horrid cramps out. It only happens maybe once every 2 or 3 years. Is it just me? I have no medical conditions that could be linked to it. It's very bizarre and an annoyance.