Hello,
I am so sorry that you are having such a difficult time. This is a sadly familiar story as young people’s mental health services struggle to cope and families have to fight to get the help they need. I think it is admirable the way you are fighting for your son, and that you are seeking help through mumsnet despite being under such stress. I hope I can be of a little help with a few suggestions.
Firstly, I would take steps to steady your own wellbeing. Perhaps you have already done this to some extent, or perhaps you feel guilty prioritising yourself. Your fight to help your son is likely to be a long one, and so you need your stamina to last. Your son is also likely to benefit from you taking care of your own wellbeing as you can be calmer for him. Maybe there’s a relative who can look after the kids, or you can just have time to yourself when they’re in bed, or you can get therapy for yourself?
Medication may be appropriate, but make sure they offer therapy alongside as this will make it more likely to help. If you need help arguing for this, you can say it is in the NICE guidelines. Be aware also that medication can have significant side effects including suicidal thoughts.
I’d contact your local SENDIASS group. They can advise you on what to do about school. You could ask for him to be transferred on a manage move to the new school. Even if he doesn’t succeed there, at least he wants to go more, and it sounds like they are more proactive in trying to get help for him. If he was on role there, they couldn’t just tell him to stay at home. I’d ask school to get an educational psychologist involved regardless, to advise the school on strategies to support him. Also, your son may qualify for an Education Health and Care Plan (for kids who need a high level of support in school). If he gets one of these, you have more choice in the school you’d like him to attend. This might be a special school, so perhaps have a look at them in the area.
If you think it’s likely that your son has autism, perhaps it would be useful to read more about autism including sensory issues, as these may be causing or adding to his anxiety? You might have already done this though.
Hope this helps a little. All the best.