Back to school

It's back to school on Thursday. I'm trying to stay relaxed about it but honestly, i'm not. I am having trouble sleeping, or if i get to sleep - i have trouble staying asleep. I feel a bit stupid ... period. I don't know why i am so worried about it, well i do but i shouldn't be. Last term was good, he had fun, they recognised his needs and challenged approapriatly. Why do i feel like something is going to go horribly wrong this term?
Maybe it's to do with what he has learnt this holiday. His reading is much improved from when they tested it and his maths is just super. I hate how school never tell you anything straight. I want to know where he is not 'he has completed foundation stage maths', ok but does that mean he is on par with YR1? I know it sounds pedantic but i want to know/gage where he is so i can be prepared for/to deal him.
What am i doing letting him learn this stuff? Although it's not like i can make him unlearn it! I think i'm going to have aplace in my mind that reads 'He can learn what he likes, if you don't like it -screw society i'll teach him at him!' Seems a bit drastic but it is going to be my / If all else fails / motto.
All the previous half-terms and holidays since this time last year have been horrible. This summer has been nice, he's been happier, busier and more relaxed than he was before. This summer has given back the little boy i lost when he went to Winchcombe.

Sigh breath and let it go.