Living shadows?

Every night when i turn off the light and stare at the ceiling and focus i can see these creatures, they look like moving shadows but they wisp around like a combination of snakes in water and smoke while looking like a dark misty table cloth. when i notice them and they know i notice them they surround me and begin to come closer to me, i can feel them touching me. it feels like a light electrical shock mixed with some undescribable feeling that gives me chills and goosebumps. they havent done any evil to me and they usually let me go to bed in peace, the nights i pay attention to them i have strange dreams. what are they? souls? ghosts? etc? they freak me out a bit but they dont scare me.