DD is 3 weeks old and feeds a lot
DS usually decides this is a good time to generally play up, hit or lash out at me and be difficult
i am not sure how best to deal with it
DS has been an only for the best part of 3.5 years so i know this is a huge period of re-adjustment but i feel ill equipped to deal with it
any words of wisdom/advice would be appreciated so i can stop being such a shouty mum
TIA