My almost 5 year old has been diagnosed with the above. Not unexpected but still a bit gutting as I'm worried about what the future will hold for him and for the rest of the family.
He is 'only' level 1 ASD so I know others have it much harder, but it's the PDA aspect I find extremely difficult; we're always walking on eggshells and sometimes it feels like emotional abuse - we're always worried that what we say or do will cause a meltdown, which sometimes goes along with physical aggression, throwing things etc.
We're trying to have clear boundaries for the things that really matter (verbal or physical aggression) whilst letting other things slide, as that was what his paediatrician advised. It does help to a certain extent but his volatility is so challenging.
His older sibling is also tricky to handle, with suspected ADHD but a complete opposite to DS5 due to being sensation seeking (constantly talking, moving, needing entertainment, no awareness of personal space) whereas DS5 prefers his own space, quiet environment etc. They constantly wind each other up and older one ends up being hit or kicked but never, ever seems to learn to give DS5 space. Sigh.
Does anyone have any advice??