What does my day-dream mean?

I keep on having a very short daydream of a small child's head turning around quickly and his head is pulsating and enlarged.Every time it happens I jolt up and feel really dizzy.Its been in my head for while after I was 5 and thought about it for a little while,and now it wont stop in my head.Its not like horrible or anything I would just like to know if it is my "subconscious" or something like that.