Yep all rings true here too, he needs me to help regulate him in the midst of a meltdown and needs cuddles but it's often hard for him to accept.
He is getting much better, and I can often nip it in the bud with a bit of humour now.
He'll often say to me 'mummy I'm full of wiggles/I'm muddled/I need to run, jump, climb'. He's very sensory seeking when in these throws. He wants to cuddle me hard, touch and pinch skin, poke, prod. I stop that and offer gentle skin contact, his cheek on my chest for example. It does calm him down. We have fidgets, stress balls and so on.
This is not all the time though, he is very loving, empathetic and kind most of the time, only when he's maxed our does all this come out. He's had one difficult morning at school since the start of term but has done beautifully the rest of the time. He ses to be really thriving with short bursts of activities during the school day and I've had several glowing feed back from his teacher.
He never stops talking though, contant chatter from dawn till dusk and ocasionally in his sleep. If he's tired it gets more intense and he's a ball of fizzing wiggles, unable to sit still, falling over, walking into stuff, knocking food and drinks everywhere. Swimming lessons make it worse but a very big warm bath calms him down, he will lie in woth just his face sticking out like a floatation tank 😁, I often think I need one of those for me some evenings!
He did used to lash out a fair bit in his meltdowns, anyone near by, mostly me, but sometimes his friends or teachers at Preschool, then he'd hold a lot of shame about it. Lots of 'I don't know why mummy', very upsetting and difficult for everyone invovled. I've done lots of work with him in naming and acknowledging his feelings.
It's worth mentioning we left a very verbally and emotionally abusive home two years ago, my exH, his Dad being the culprit. DS only sees him in supervised contact sessions now. ExH could not cope with family life at all and placed all blame onto DS and me often in explosive tempers. I know that played a big part in how DS showed his emotions and how he saw himself, he mirrored what he saw from exH in his actions and his hateful words used against us. I dont think its caused his 'wiggles' but it's exasperated it.
I've spent the past two years undoing all of that and building up DS's confidence and pride in himself. He's finally got some sessions of Play-therapy too.
This is hopefully not your sotuation at all but I'm trying to use lots of aspects of Therputic Parenting with DS and its brilliant, specially PACE to difuse situations. It's worth a Google.