Is Something Haunting Me Or Following Me?

It began when I was 10, I moved to a small city to the cheapest house with my mother and siblings. Some of our family came to help us move in, my cousin stayed the night over and witnessed something. While he was watching a movie on his laptop in my would be room a girl with long black hair, white dress and pale skin walked right past the open door and into the next door room. He was so frightened that he never came to visit again and had left the next morning.

After that strange things would happen in that house, knocking on the wall or on the bottom of my moms bed, people would see things and the worst of all was some shadow thing started following me around.

I was sleeping with my siblings in the room that girl had gone into, one of them woke me up by crying. I put them back to sleep and then tried to myself, as I did this I looked over to the open doorway. I became gripped with fear because I saw a shadow figure standing outside the doorway, it looked like a moving scribble was staring at me with no eyes. I was intensely scared but I didn't call out or do anything, I just went to sleep. When I woke up the next morning I decided to not tell my mom because she doesn't like to talk about spirits or ghosts. For the following days I would wake up and find it watching me, no matter what room. I could see it and sometimes it would come into my room or it would wave at me from a doorway. But it would only follow me and no one else had ever mentioned seeing this. I can't remember how long this went on for but I do know how I would repel it, it wouldn't show up if there was enough light. Because of that I started to always have a light on in my room.

We moved eventually to the other side of town to a new house, things by then had settled down for me because I would constantly sleep with lights on. But because we moved I started to loosen up and turn the lights off and close my door, unfortunately I woke up one night by a text from my mom. She had texted me to see if I was awake because the dogs were barking at noise that was coming from upstairs (her room was on the bottom and ours were on the second). I then decided to look through my doorway to see if I could see anything or hear something, when I looked through it I saw a girl laying down in the top of the stairway. She had long black hair and was pale but I couldn't see any other clothes. I felt fear because I could see her even though a light was on and I could feel she was asleep, I'm not sure how but I knew I didn't want to wake her. So I just laid back into bed and quietly went on to my phone to try calm down, I heard my mom start to come up to use the bathroom. I waited to see if she would react or see anything but she didn't, after she went downstairs again I looked again and didn't see her.

From then on I kept seeing or hearing things and my mom would hear me talking to people while I'm sleeping. I tried to fight it off by buying Christmas lights and stringing them up so no one would turn them off. It didn't work but it started to cool down and I stopped seeing things.

I started to forget about this until we moved again, I thought that maybe I could finally put all of this behind me but once again I was wrong. After a few weeks of living at our new house I had a terrible dream about something trying to grab me, I woke up whispering please don't hurt me. After that I became very paranoid that something was following me again.

Recently I woke up one night and looked at my bookcase and saw something starting to form. It looked like shadow was starting to bubble and take shape, I stared for awhile until I grabbed my phone and shined the flashlight on it, it instantly disappeared so I just left lights on that night. Now every time I leave the lights off at night I see it moving around my room like it's slithering on different things, it can't go near my window because there is too much light from outside. I have tried to talk to it and I have touched it but it doesn't respond to either. I haven't given it any chances to form again because I'm too scared, I'm not sure what to do and I don't know what it wants.

I've experienced things like this before like visions of my siblings before they were born or talking to spirits when I was young. But I don't know how I triggered either or if I have abilities. I really need help but I don't know anyone who could help me or point me to the right person. Please tell me some advice or even anything you know.