Over the past couple of weeks I have been experiencing some strange sensations. The first is when I lay down and close my eyes I feel like I am on a boat or a swing that is swaying. The second is a weird/hard to explain one. In the brief moments before falling asleep I get this "power off then on again" sensation. It is as if my brain literally shuts down (hearing, sight, etc.) and then my brain "zaps" back on. It is an extremely painful shock in my brain that rips me out of that "dreamy but not asleep" stage but it only last for a few seconds. The third is an electric shock feeling that "zaps" my brain and travels down my spine. My vision blurs and my hearing cuts out. Again the zap only last for a second and everything comes back to normal but it leaves me feeling hazy an nauseous. The first two are just at night. The third is any time and is increasing in frequency. What on earth could this be? Are the three related?