I suggest that you put him in the 2.5/hr a day Kindergarten for a while. That way, you can get some rest and re-evaluate the situation. Then, you can decide whether he'll be emotionally ready to skip 1st and go to 2nd next year or whether he'll need to go to 1st. You can also do some research on different schools and see what's available to meet his needs.

He can unwind, destress, and play for a while.

Meanwhile, take a breath. Or two. Or even three!

What I am is good enough, if I would only be it openly. ~Carl Rogers