OK not a demon but he has always been a very good child up to now. He is finding it hard since birth of DD on Sunday. I'm really trying to make time with him (at the expense of the poor baby!) and be normal with him and he has loads of attention from his Dad, but he is just being volatile, throwing stuff, hitting us a bit, pulling hair etc. stuff he has NEVER done before. He is very articulate and has started saying stuff like 'Leave me alone' and 'I will talk. You will not talk'.
Any tips? will it pass and how quickly? I feel so bad for him because he's looking pale and unhappy, his whole world has been destroyed!