Just don't know if I will cope

Got a 10 month old boy and due a baby girl in 45 days, my house is a mess and upside down because I have a plasterer redoing my living room after a wall coming apart, my head feels like I'm constantly stressed because of trying to make sure everything is sorted before baby arrives, but to me it feels that nothing is gonna be sorted, I just feel like we've had kids to early and not thought about the way things would change, I wouldn't call my children mistakes as I love them like nothing else in the world, but somedays I really feel like I could just ignore everything and be done with it for a few days X