I laid down to go to bed, and got up an hour or two later to use the restroom. When I sat down on the toilet, my heart started to race and my ears started to ring. I went unconscious for a moment and when I came to, my jaw was clenched, my legs were as far out as they could go, and I had my hands in my hair and pulling it. My ears were muffled and I could still hear the ringing. What happened to me?