Non uniform anxiety

[Saph89]

Hello
Looking for some advise, if anyone can help please!
My son 14, has had alot of anxiety for the last year - presents by him being physically sick - he is undergoing assessment for autism, school have found enough evidence as have I. One thing that I'm struggling with is how to support him on days he just doesn't want to go to school, for example today is non uniform day and he is already being sick with worry. Does anyone have any advise how I can prepare him or to help him face these days.

so today is non uniform day

did he decide yesterday what he was going to wear and have laid out so no decision making?

for example today is non uniform day and he is already being sick with worry

it is 8.30am. So he’s not going in?

Yes @FunnyFinch we planned what he was going to wear and and he had it all ready. No he was sick so he didn't go in. He is sick every time he gets really anxious. This has been an issue for the last year so I'm still trying to learn what is best to do for him, what things help or don't help so I posted on here to see if anyone has experienced anything similar or if anyone has any advice as I feel lost what to do!