Overwhelmed by housework and mess

I’m a stay-at-home-mom with two kids (age 1&4) and another one on the way (10 weeks). My husband travels quite a lot for work so it’s usually just me and the kids at home. I often feel defeated and overwhelmed when I see the mess in our house (laundry, dishes, clothes, toys and random things on the floors), but I find it hard to motivate myself to start cleaning. When I have time to clean the house, I often just start buffering (social media, online shopping, or just sit/lie there and do nothing). It has been a problem for me since I was little, and it just gets harder now I have little humans making more mess everyday. I want to find the motivation and I want a clean house!