Somtimes when i sleep i wake up in the middle of the night, my body is paralyzed and i have illusions. what can i do to prevent that?

Sleep paralysis: This is an interesting phenomenon called sleep paralysis. Start by making sure you get enough sleep. Do what you can to relieve stress in your life -- especially just before bedtime. Try new sleeping positions if you sleep on your back. And be sure to see your doctor if sleep paralysis routinely prevents you from getting a good night's sleep.

Sleep paralysis: You're having episodes of sleep paralysis, which are often accompanied by hallucinations. Rare episodes are normal, and it tends to occur more often in people who are sleep-deprived. Some narcoleptics have frequent episodes of sleep paralysis.