Gcvmom, the diary suggestion shouldn't be an onerous task - there are many purposes. First, you need to keep things in mind to share with the doctor. But most important - these are the sort of things you want to remember, for the days when you are a grandma and you want to share the fun things with your son's kids, about their father.
Also, when you are a grandma (or your son is older and functioning more 'normally') this sort of stuff tantalises at the back of your memory cells and drives you crazy when you can't remember the stuff you thought would be unforgettable.
A serious suggestion - to begin a diary, go back through all threads you've started on this site, and copy/paste them to a text file, with the dates.
The diary shouldn't be all bad stuff. it's best if you consider it a PMI (stands for Plus, Minus, Interesting) and include all the things that YOU feel are worth mentioning. The good stuff in there too - that's to cheer you up, make you see that there IS a light at the end of the tunnel and it is NOT an oncoming train!
The diary is FOR YOU. But your son also needs you to do this, for him - secondary benefit.
An example I've used from my diary on difficult child 3 - he was about 6 years old, still struggling with language but beginning to use it creatively. We were driving in the car through the city and it was hot summer. difficult child 3 opened the window beside his seat to get some fresh air, but as we moved out of the city into the open road, he shut the window again and announced to us, "I had to shut the window because the wind is poking my eyes."
A diary entry I never made with easy child, but which has passed into family 'history' and language, is a menu item - "fixed" potato. husband was making mashed potato one night but easy child didn't want hers mashed; she said she wanted fixed potato instead.
The ability to use language creatively as well as effectively - wonderful stuff. Not just restricted to humans. The research on Washoe the chimp, who was taught AMESLAN, showed similar linguistic creativity. Washoe knew the sign for drink, for fruit as well as many other signs. The first time she was given watermelon, she combined those two signs and labelled this yummy stuff as "drink fruit".
Wonderful stuff!
Marg