I have 3 kids under 5. One just turned 2 today and my littlest is 3 weeks old. I'm so tired. When…

I have 3 kids under 5. One just turned 2 today and my littlest is 3 weeks old. I'm so tired. When everyone is asleep at night and I'm up with the baby I just try to think about ways to make everyone's quality of life better. I wish my significant other could understand how hard this all is for me. I feel like Im losing my mind all the time. He can be so selfish. I need to be more selfish so I have a balance. I have my hobbies and things I like to do. I just don't have much time to do anything which is understandable. Just running the household takes up all my time. When I was in labor I kept saying how tired I was. It's funny to me because I meant from just my life not particularly from laboring. I thought laboring naturally without any drugs was a piece of cake compared to what I deal with on a daily basis. I wish I could apply all the labor techniques like breathing and everything to my everyday life. Maybe I'll work on that. I tend to blow up. I get too far to where I'm at a breaking point and I lose my patience. It really leaves me feeling so unhappy with myself and guilty. I yell and that makes me feel so horrible about myself right after I do it. I have a lot to work on. But I came on here and I'm writing this to post here bc I'm seeking support. I'm trying