I am going crazy

I'm a stay at home single mom with a 2 year old and 8 month old I feel so depressed and I feel like I'm going crazy I barely get 6 hours of sleep because the baby wakes up at night and then he wakes my other child up. I feel drained I am literally here with them 24 7 I don't go anywhere I'm on government assistance so I don't have a job and I just feel like I'm going to lose it being stuck in this house every day I have been yelling at them because they don't listen my 2 year old makes a huge mess and writes on the walls and wines when she doesn't get what she wants. She's always throwing tantrums if she doesn't get her way and my baby crys because he wants to be Carried all day I can't shower cook or clean without him screaming and crying I don't know what to do anymore I don't have friends or family to talk to I just feel like every day it's the same routine and I don't feel like I have a purpose here