mothers making it

So any single mother that had to take care of babies by themselves with no help in the middle of the night? I stay with my dad but he works all day and sleeps all night 24/7. My mom doesn't stay in the house cuz they don't get along. My sister moved out and was telling me my mom needs to move back in to help me because it's nard to do it myself like I don't know. I told her she works night and if other moms can do it I can. Like she was seriously getting mad at me because of the situation. I didn't even bring it up. I was mad because if you want to help someone you help them and my mom is always gona be there but my sister barely there for me. Like I don't have to ask for help you should offer help if you feel so strong about it like how are you getting mad at me about my situation??? I really don't get her. She always have something to say but never do anything about it. She is so self centered.