Help.

Me and my SO just had a baby, and I can't stop being mean to him, he goes to work, comes home and spends a little time with baby, and won't help me at night, I find myself being really mean to him and I can't help it, it just builds up, I don't want to be like this. I have barely little sleep. I understand he works, and I'm grateful, but I need help, I can't do it all day. And I know it sounds bad, I love my baby, but sometimes I just need a little break. 😞 I'm feeling like a real bad person, because I let my mom take her at night, and I know she needs sleep, but I'm also so tired. I just don't know..