I feel defeated

Everyday I try my best and I still feel like a horrible person and mother. It’s almost 2am and I’m up with the kids. I love taking care of them I just feel so defeated and I can’t help but to get aggravated and upset because they won’t sleep they’re sick and both want to be held. Which isn’t a issue my husband has our room and I’m in the kids room my son is on the toddler bed which I just moved from and my daughter 6 month is in the bassinet and I’m on the floor every move I make they wake up. I have until 5 to get some sleep so I can help my husband get ready for work. I have no one to talk to and I’m just so tired of everything. Probably doesn’t help I’m pregnant again but nothing I can do about anything now. I’m just sad and tired.