I was about 13 when this happened. I had about two or three encounters with paranormal activities but this was the most frightening. It was already 2:00 to 3:00 a.m so I decided to go to sleep since I was already sleepy. I really didn't like to go to sleep alone so I got my dog Jadah to sleep with me.
My mom had already told me that my sister's old room was haunted by an evil entity, but I wasn't really bothered by it, so I had just started to go to sleep when my dog started to whimper. She sat straight up and ran into the room since the door was open. She ran under the bed and didn't come out for about 10 min. I started to get worried so I called to her, but she didn't come.
By this time I was already scared so I called to her again, she had came out the second time I called her, but I still didn't want her to go back so I shut the door. An hour or so passes and nothing had happened so I decided to try to go back to sleep, as soon as I shut my eyes the door opened and a cool breeze rolled across the sheet. I hadn't opened my eyes yet, a couple of minutes later the bed begun to shake violently at that moment I sat straight up and my dog was growling at me.
Right at that moment she jumped at me and I threw her off of me, she immediately snapped out of it and ran to my mother's room, with me right behind her.
PS: I never slept in that room ever again.