am i going crazy?

(I apologize in advance for my english as it is not my first language)

There's a playground in my neighborhood where I usually meet up with my friends because it's closer to our homes. I was waiting for a friend of mine and, since it was school time and the children weren't there, I sat on the swing. I started swinging and go faster and faster but, with the corner of my eye, i saw a child behind me. He was sat cross-legged and smiling at me, brown hair and bowl cut. I immediately stopped the swing so as not to hurt him but when I turned around he was gone. If he had run away I would have seen him since there was no place to hide. I remember a while ago, in the same park and completely alone, behind a tree I heard a child's voice counting.

Another story:

On Saturday mornings, having no work to do, I enjoy some time in bed using my phone. I had been woken up by a few hours when, at the bottom of my bed, I saw a little girl with blond hair and braids.

Am I starting to see things or…?