You dont know what has been heppening to you, you started seeing things and that thing is demon like creature but he hasn't been hurting you, you could hear him and he was sweet but that was worrying you, your friends gave you an advice to go and see a psychologist so you could get help because this wasn't normal. Right now you were in the office of psychologist, telling him what you have been seeing. You:"the only time i ever see him, is when he is behind me in the mirror, even from the distance i can hear him, i try to listen but his whisper makes my ears hurt but i have never seen him in the daylight, he only appears when it's night time." he listened and decided to prescribe Soothing medication, psychologist guess was you were stressed/tired and needed some rest.