Can someone tell me what this dream means?

Date: 5/23/2018

This isn’t a recent dream. It was actually from awhile ago. I felt like I should mention that. So, this dream started out by me looking down at a girl. She was wearing a private school-like uniform, and she was holding some papers. She had short brown hair, brown eyes and she looked like she was crying. She was, 9 or 10 I couldn’t tell. And she randomly said, in a British accent (for some reason?) “Why are you laughing?” (I wasn’t laughing by the way.) Then, I was in my room. Except my room looked like a pencil drawing. Everything was white except the few black lines of every detail in the room. There was red writing scrawled on the walls. They said things like why are you laughing?, you’re just a little kid, I don’t want to be a kid, stuff like that. All I could hear was a mix of static, some unintelligible whispering, and the sound of someone hyper ventilating. This went on for (what felt like) a few minutes, and then it just stopped. The noise stopped and I wasn’t in my room anymore. I was instead in some white place? It kinda looked like a gallery, except the only thing there was just this huge white picture. Then there was a box with some word above it (I can’t remember what it was) and underneath it, it said “the fear of being a little kid.” So, can anyone tell me what this dream could mean? It’s been bothering me for awhile.