I’ve had other hypnagogic hallucinations, though not that. But my late aunt, who was probably near your age when her father died, afterward used to insist that he came and sat on her bed in the night and talked to her. She wouldn’t call it a ghost; she spoke as if he were really there, even though she knew he was gone. Just wondering: do you happen to be in any particular position when this happens? Specifically, are you lying on your back when you wake up with this sensation? I’m assuming you do know that there is a state of very light sleep in which we often think we’re awake, but we’re really not.