It sounds a lot like OCD to me. I started having problems with OCD at around 4 and wasn't diagnosed until highschool. I think you should definitely talk to a proffessional about this and get advice. It's really good that you are noticing and picking up on these things.

When I was around 5 I would organize the classroom and the desks had to be straight and lined up and lined up with the carpet seems. I also had to be in the same seat and had ritualistic tendencies at school. You might consider asking his teachers if they've noticed anything. I had a really hard time remembering back to my first grade teacher yelling at me because I was "unflexible". My parents sided with the teacher. It was really tramatic for me because I was "unflexible" because of the compulsions I felt I needed to do. At such a young age I didn't know how to express this to my teachers or my parents.

This is just my experience but I reallydo think you should take him to a child psychologist. They will probably be more experienced in identifying exactly what is wrong and pinpoint what is causing your child so much anxiety, especially if he doesn't know how to explain what's wrong.

I hope you figure out what is going on.

Good luck... and I can't say enough of how good it is of you as a parent to notice these things.

(((((((((hugs)))))))