baby is 2 weeks old, my 4 year old is driving me crazy!

Tracy
I have cried, yelled, screamed, time outs, she is testing me beyond my limits, I have already sweeped the patio 2x of dirt she dug up that I gave her a time out for. She ripped all the leaves off my mother in laws hostas plant, I've made hr 2 dinners already that she asked me for and did not eat any of it. I've resorted to putting her to be hungry, I am so angry I don't know how to show her love when she is pushing me like this. She shows that she feels sorry by crying and saying I'm sorry, but goes back to doing something that I don't like. I have not felt this horrible in a long time. My husband asks me why I am crying? Well because your 4 year old daughter is making me crazy. I can't enjoy my newborn. I'm trying to breast feed and pump and she has made it impossible I'm so stressed. Idk if I can take it anymore I just want to curl into a ball and cry!  Has anyone else experienced this? Can anyone please give me something to work with.