hello i have a 2 year old son and his behaviour has become really bad at home he throws toys at his older sister he pinches and punches for no reason, he headbuts walls doors and floors when hes upset. he also gets his willy out when he gets told no and walks around with it out and wees, he is non verbal at the moment he can say a few words like mum dad yes. could i have some advice if this is just a normal 2 year old behaviour or does it sound like adhd/autism