I am sorry but this is a delusion or even maybe a psychosis.

I have had experiences like this but I can see now that they were just reflections of my own paranoia and ill health. Someone used to visit me in the night and scare me (I am a 41 year old man, btw!). When I was ready I confronted it and just laughed at it and said over and over 'I know you don't exist, I know you are just an hallucination'

It stopped and has stayed stopped for years now.

You are safe.
You will not come to harm.
This thing is not real.