I'm looking for some advice on my 4 year old regarding whether his behaviour might indicate an underlying problem, and how I would go about getting assessed. At home and when he is out with me he is very defiant, gets angry quickly and will hit and throw if he is in a rage. He is very shy going into social situations such as children's parties or any activities like football and will remove himself and sit at the side, or run away and bite me if I try to get him back in. His behaviour at nursery is apparently exemplary and his speech is very advanced, cognitively I would guess he is about average e.g. can recognise numbers and count, recognise some letters etc. I'm really struggling to know whether it's his personality, my parenting or if there's another problem. We have ADHD and Aspergers in my family and I was highly anxious during pregnancy. Any feedback would be welcome, not sure what to do next!