We are chilled out parents, only shout when we really need to, she has a good diet, is given lots of love. We go to playgroups nearly every day. She is super bright, has loads of toys. she just appears to have lots of pent up aggression in her. she wants to hurt her baby brother and other babies at playgroups. she is difficult, screams and struggles when trying to get herdressed. screams when we put tv off. she doesnt watch much. I just feel like I'm getting to my wits end with her . please help