Character having partial seizures

This is a character having them before she knows she has epilepsy. It is similar to the aura Prince Myshkin suffers in The Idiot
 

Nevada tried to do as the doctor prescribed. It worked somewhat but the dreams and the night terrors still came. One night she woke shivering after she had a strange dream that she was in a snow storm. She was walking down her street with her father. They were not wearing coats she remembered, but that did not seem to particularly effect anything. They came to the house, which was dark. They went in to the dark house and turned on the lights. She went to her room. Then she heard a loud boom, like a gunshot or something, and she awoke partially form the dream paralyzed. She was still in the dream though and she ran out of the room into Taylor and Erin’s room and she saw the scene just as it had been. Taylor was laying bleeding out on the floor, her throat cut, and Erin was laying there tied up in the knocked over little chair, bleeding, too. The dream suddenly ended and she was able to move freely when she saw his face directly above her, looking down. She jumped out of the bed and screamed. When she came to her senses she realized she was shivering, goosebumps on her skin. The shivering continued for about five minutes, even under the covers. It took a while for her to go back to sleep, the fright that she might dream again, or suffer a night terror falling asleep keeping her tired eyes open, but finally her eyes closed and she feel into slumber. But she kept waking, and the waking was only partially awake. There was no paralysis, but there was this strange sense of her own existence.

It was a deep sort of impression, and she felt out of her body in a sense, but not completely. No words could describe this sensation. It was most frightening and uncomfortable because on the one hand it was an intellectual consciousness and on the other there was something corporeal to it, this uneasy feeling that she could feel in her whole body. It was a lightness, like she was a spirit, combined with a coldness that seemed to rise from somewhere in the netherworld rather than come from the air. In her mind she was thinking of her own being, and how she really was—was!—and how Erin and Taylor were really dead. That her dad was dead and that the conversation she had with Dr. Cordatus was real. She was remembering it vividly, hating it, and hating it all. Not because it was an evil thing, the murder, and sharing her feelings with the doctor was a sad recollection, but because it had really happened. This sense of it happening was the sense of something happening as an event in and of itself, as in its being, or nature as an event. This feeling eventually subsided, but it was followed by three or four sensations of falling into somewhere as she was falling into the fullness of sleep over about a thirty minute period. And then finally, she did sleep.