What Causes Nausea And Convulsions During Nights?

On multiple occasions I have woken up Nauseous from sleeping and while still lying down (and NO ATTEMPT TO SIT UP) I faint. I m positive I didn t just fall back to sleep & my husband has witnessed these episodes. Sometimes I turn yellow, and go limp and my eyes stay open and appear dead and not breathing, while other times I convulsed. I ve gone to so many Dr s and Noone seems to know WHAT is going on.