I Think There's A Girl In My Room

I'm a 21 year old girl and I believe I'm haunted. Haunted isn't really the right word for it since I don't feel any sense of dread or any fear whenever this entity is close to me. I think it's a ghost of a little girl. This has never happened to me before so any advice and opinions will be helpful.

It started a while ago when both my sisters started complaining about my room. They think it's scary for some reason. I never understood why, it's a bright room with a big window where the sun shines in. Soon I began to feel cold spots and cold breezes touching my face even though my door and window was closed, especially at night. Things like that begun happening often, basic things like lights flickering shadows in the corners of my eye and moving cold spots. I often feel watched but it feels like whatever is watching me is only curious and wants to see what I'm doing.

One of my two real encounters was when I woke up at 2 am to go get a drink of water. I have to pass my 8 year old sister's room to get to the kitchen, and when I do I hear a sob. I freeze in my tracks and listen. Two more sobs. I thought it was my little sister who had woken up and gotten scared of the dark or something. I walked in and asked if she was okay and if she was scared. She wasn't in her room. The room was empty (she sometimes sleep with my parents if she get's scared) and I darted out of there, shutting my door tight. I laid back to sleep and a feeling of guilt rushed over me for some reason. Like I had left a sad child all alone in the dark. I went up and opened my door a crack and the feeling disappeared.

My other encounter was very recently and I would like to hear what you guys think of it. I was drifting off to sleep when something woke me. This part is hard to explain, it has never happened before. It was like my mind woke up but my body was sound asleep. I could move but my body couldn't. I don't know how else to explain it. It was completely dark and all I heard was a low sound.

I have tinnitus so hearing a shooo-ing in my ear is nothing unusual. However, hearing laughter is. I heard a laughing in my head and it got louder and louder. Nothing malicious, just someone laughing. I mentally asked, "Is anyone there?" and I heard a little girl's voice say, "I'm here!" I got so startled by this I physically yelped. The little girl's voice said, "I'm sorry, I didn't mean to scare you" and I replied, "I didn't mean to yell, I'm sorry too" but by that point I had woken up for real and was talking into thin air.

I don't know what or who this is. Maybe it's all in my head, I don't know. I would really like some help understanding this, so if anyone have an opinion I would love to hear it. Thank you for reading.