So sick of Evelyn's behaviour atm. She's definitely acting out now the baby has arrived! She's…

So sick of Evelyn's behaviour atm. She's definitely acting out now the baby has arrived! She's refusing to eat at meal times, not sleeping in her own bed and the backchat is horrific! I'm so tired and really struggling with remaining calm with her. I know it's just challenging behaviour and it makes me sad that she feels this is the only way she can get our attention. I feel awful because I want my sweet calm natured girl back and feel like I must be doing something wrong for her to be behaving like this :( if anyone has any hints/tips on dealing with this I would be very grateful