Felt i had to reply although nothing to do with schooling as your son sounds very similar to mine and has been recently diagnosed with autonomic dysfunction with blood pressure. Please if he will let you check him for POTS/orthostatic hypotension, easy to do with a standard blood pressure monitor and oximeter. Check from laying/sitting to standing. It's more common with those on the spectrum but not shouted about, presents as high anxiety. Was treat as behaviour problem with my son for years as were many refusals. He too has the separation anxiety and tics when stressed or tired. Really wish we had known sooner, it might not be but worth a check.
Felt i had to reply although nothing to do with schooling as your son sounds very similar to mine and has been recently diagnosed with autonomic dysfunction with blood pressure. Please if he will let you check him for POTS/orthostatic hypotension, easy to do with a standard blood pressure monitor and oximeter. Check from laying/sitting to standing. It's more common with those on the spectrum but not shouted about, presents as high anxiety. Was treat as behaviour problem with my son for years as were many refusals. He too has the separation anxiety and tics when stressed or tired. Really wish we had known sooner, it might not be but worth a check.