Tell me a scary story

This happen about three months ago. It was about 11:30 pm and I was getting ready to go to bed. I felt exhausted but for some reason I also felt restless. No matter how hard I tried, I couldn't fall asleep. Eventually it started to hold and I started drifting off. All of a sudden my heart stopped and my blood ran cold when it felt as if someone had laid down next to me. I could feel the arm on top of me and the bed move as they shifted position. I jumped up and looked around. Nothing. I turned on the lights and still, nothing. The air felt cold and heavy. I turned off the lights, jumped into bed and finally passed out after the panic had settled a bit. My sister door has some weird things going on with it. The door is long enough that it scrapes the carpet and you have to push it pretty hard to open. So the thing is that sometimes it opens itself. Just a crack but its enough to freak you out cause there is no air pressure there cause its a small hallway and we usually keep the windows close. This happen about two weeks ago at work. I was preparing my process like usual when I saw someone in a hoodie go to this back area. This area has boxes that are required for shipping material and a couple of lockers. At first i thought it was my friend going over there to hide for a bit. As I thought that I noticed him on the other side of the factory. So curiosity kicked in as to who it was so i went back there...empty. No one was back there. I had walked up there and the only way in and out was through me. Yet no one was there. I turned to walk back scratching my head when i felt the hairs on the back of my neck stand up. I didn't bother look back. I just walked out and told a couple of people. They said they too have seen someone walking around some times, only to find out no one was there. I remember a guy almost crying one time coming from the other side of the factory. He was freaking out cause he saw someone there. This happen during night shift and there were only 4 people in shop. The other two were on the same side as me and he had been by himself. So I went to go check it out and I didn't see anyone. I told him maybe he had seen an animal that got in and he said no, it was a person. I looked around and never did fine anything. Rumor has it the the previous owner killed his business partner and got rid of him in one of the acid baths we have at work. I hope that's not him.