The description of the electrocution sounds like a kundalini awakening to me. I think maybe that is what has happened to you. As for the dream about possession, it sounds extremely frightening. This woman that chants over you while you sleep, perhaps that is causing the nightmares. Is there a spiritualist church near you you could go to for help? I think you probably need someone to help you sort all of this out. Please keep us updated, and try to remain as positive as you can. Good luck!