I have been having sleep disorder from past few weeks. I suddenly wake up after 3-4 hours of sleep with my body paralyzed. I often see unearthly creatures during this episode. The creature would come and sit on top of my chest making it difficult for me to breath. The episode goes on for a few minutes. I am unable to sleep or rest properly because of this and it's affecting my personal and professional life as I'm not able to concentrate on anything.