I agree with what Em has said, a nice balance between your innate kindness and concern for your kids and their home life, and recognising that you are important too. Looking after you is also helping your kids, so whatever you can do to keep your boat stable in the waters of life with all it's challenges, is definitely worth it.
Maybe while you're enjoying time with your kids, in these last few days, you can talk to your son about any concerns he has, and brainstorm some strategies- gently, and maybe choose your time, when he is relaxed but not just before bed or anything. Then you could make some notes and be prepared for informing the school of anything you'd like them to know. I have a note on my fridge for my d's teacher, so that I won't forget when those early parent teacher meetings happen. We have some in the first week or so now, usually, for all kids if parents want that.
This is definitely the time for enjoying the last days of holidays, preparing for the new school year by being organised and relaxed at home.
I braved the shops yesterday and bought new school shoes, plus new swimmers for me. I felt a high sense of achievement when I got home! Two huge things in one afternoon!
All the best Mark,