Wild
I think you have perfectly acceptable fears about gearing up for another school year .. Last year you got through it by kicking and clawing your way to the end you were just a mess .. \
But look at you know now ! Your in a much better place and I think once you make it through the first week you will find your groove..
Yeah Mindfulness ! That will help you so so much .
You are going to be just fine

I also bet your son will do just fine at Pre k