Demonic Possession? Options

A few years ago, for several months, I frequently had strange episodes which I can only compare to demonic possession. It always started with a strong feeling of anxiety followed by uncontrollable laughter and loss of control over my body. After a few minutes of laughing and lying paralyzed on the floor, I would begin convulsing and my voice would slowly start to change. Eventually the laughing would stop and I would involuntarily scream what sounds like gibberish in seemingly impossible voices, sometimes several voices at once. I've tried to reproduce these voices, but I've never succeeded.

After several minutes, that would stop and I'd just be jerking occasionally without making noise. But even after the jerking stopped, I would still be unable to move or speak for several minutes, and when I finally managed to mostly regain control of body I would start jerking again every few seconds, and I would be extremely thirsty. During the episodes, I would also sometimes go into positions that should probably break my neck, and I estimate my heart rate increased to around 300 bpm. Also, I have almost no muscle mass, but when a pretty strong friend of mine saw it happen to me and tried to stop it, I effortlessly held them back with one hand.

This doesn't happen to me anymore, but when it did I would always wake up at exactly 3:00, 3:30, or 3:33 every morning. I would often wake up in the middle of speaking in one of the voices, and I once woke myself up with an inhuman roar. I would also wake up much stronger and faster than normal, but that only lasted a minute or two. Even now that it's over, if I happen to be awake at around 3:00 am, I will hear things outside my door. Things, almost human, whispering in a language I don't understand. And in the weeks before it started, I often saw shadow people and other strange beings in my house, including white shadow beings and an almost ethereal mist moving through walls and eventually out of the house. I was checked multiple times throughout this, and my brain was functioning normally, so I doubt I'm just insane.

This hasn't happened for a while, but I'm still curious as to just what it was and how I can prevent it.

I'm inclined to think that possession can happen, personally. I also think, however, that it is one of those things that people really do not *want* to believe in the possibility of, (for fairly obvious reasons (IMG:style_emoticons/default/laugh.gif)) and so they attempt to use pseudo-rationalistic explanations for how it might happen instead.

I think a lot of the time, Occam's Razor gets misinterpreted; to me, simply saying that a person is possessed by demons, is actually a MUCH simpler and less complex explanation than a lot of the other pseudo-psychological rubbish that gets thrown around when attempting to explain it. (IMG:style_emoticons/default/wink.gif)