How to deal with almost 4 year old behaviour

[Niki022]

Im having a really tough time recently with my almost 4 year old. The last year or so he's behaviour became awful i honestly can't deal with him anymore ...in he nursery they think he has adhd i think he got referred too to check but we haven't heard anything yet. He's really rough with his little brother like strong hugs, sitting on top of him, hitting his head..all for no reason(the little one just cries all the time because of him). He's trying to be really independent with stuff he can't do and i can not reason with him because he doesn't listen to explanations at all. He's just looking for trouble all day playing with stuff he cant play with. I feel like im shouting all day nothing else works. He usually doesn't wanna go out either. If we go to the playground he gets really close to babies hugging them saying how cute they are going in their face...it just feels weird. Help me please

How old is his brother? Any recent changes in his life? Or at home/school?

His brother is 1.5
No changes
He's supposed to start school this September because he turns 4 in the summer...they worried in the nursery how he's gonna manage because he needs constant 1on1.

Make sure that you do send him to school as they will expedite assessments if he is as you say. I am so sorry that you are having trouble like this....my grandson was like this and he turned out be high functioning autistic. With early support and intervention he has bloomed into a clever and lovely 17 year old. His brother has adhd and that has been more difficult. Don't let anyone get away with labelling him naughty and raise hell until you get support. There are usually local groups that can help and even social services would not be the enemy if you asked them for help and support. Good luck and hugs from me. X