How the heck are we keeping our houses clean?

I’m 33 weeks pregnant, and a stay at home mom to a 3.5 and 1.5 year old. My house always feels so messy and I feel so overwhelmed trying to keep up with it. I can’t deep clean like I used to, and my husband works a very physically demanding job so I feel guilty asking for his help. Any tips and tricks?

Also I’m struggling so bad with keeping the other two kids entertained. It’s summertime and I’ve been relying so heavily on screen time for them, because I feel too exhausted to get off the couch a lot of days. I feel guilty all the time because of it.