Lost and helpless

My husband works 60+ hours a week at night, 12 hour shifts 5-6 nights a week. We have 2 kids that I stay home with, A 2 year old and a 3 week old newborn. I feel so lost, stressed, exhausted, and I feel like I'm losing my identity. All I wanna do is cry, I'm so tired so I slept all day, and I'm up all night. I have so much rage that I take it out on my daughter, by yelling at her all the time and I know that is confusing her so much. My son it literally lached to me almost 24/7 due to breastfeeding and he's been that way since we brought him home. I absolutely hate breastfeeding and it makes me so sad because I was so excited that I was going to be able to actually do it this time, as I wasn't able to breastfeed my daughter but it's so exhausting and there's days that it's all he doesn't wanna be lached. My house I a complete disaster I wanna get out of the house but I don't have the energy. I wanna start working out and getting healthy again but I'm so tired that I can't even get out of bed. I want to stop feeling like this and start feeling like I was just a couple weeks ago