My soul... so maybe just a part of me is moving back and forth?

Honestly, that's something I've wondered about. I've heard that when some people get additional memories, sometimes their body changes to match whatever they looked like at that time. So someone who remembers a few years would become older.

Maybe it's related to that? If I was tired at the end of the day in my dreams, if could explain why I don't feel like I'm sleeping?

[Though it doesn't explain why the individual dreams are just different enough to not make sense as a single memory.]