Caudwell children's charity are really good
There maybe some groups around for children with asd in your area.
When he has these episodes of violence, afterwards, try and think about the lead up to it. I start by identifying any vulnerabilities, so did he have a bad night's sleep, is he hungry, was he overwhelmed. Then replay the lead up to these episodes and really put yourself in his shoes, think about what he could see, smell, feel.
How is his communication? I don't just mean speech, but his expressive and receptive language.
If he's showing signs of PDA i give closed choice options. So if for example, i know my son will resist going up to bed, instead of saying it's bed time let's go upstairs. I'd say "what toy would you like to take with you to bed?" Or "what pyjamas would you like to wear" because it takes the deman away and gives them some choice, they are doing what you need them to do, but they are still having a part of control over their self.
My son is 8, and I have similar issues, because he can't regulate himself well, and it's really tricky. And it's normal to be worried about the future, when they get stronger etc.
When my son is having a meltdown he is just so overwhelmed and out of control that trying to talk to him rationally at that point often doesn't work, so I talk to him once he's calm.
It's so tricky because you feel like their a ticking time bomb waiting to go off. I now think more that if it goes off, it goes off. And I've learnt by reading his body language when hes likely to go off, and try to reduce it. The reality is that he will explode, so trying to manage the aftermath is much easier when you have a protocol. When you have a mental list and feel more prepared.
You're not alone, it is hard, really hard. I'm a single parent and it's tough. So I'm sending you strength and solidarity ❤️