It’s a bit late to tell you to pace yourself, but if you still have a lot of cooking to do, go for as simple as possible: buy some nice rice or other carb mixes, make a few dressings you can use on different salads, buy or doctor bought desserts, etc.
Re laundry: I don’t know how much space you have but if you have a secure area that the kids won’t demolish, sort clean laundry, hang whatever will go on hangers anyway, and don’t obsess over what doesn’t get put away.
Re cleaning: there’s dirt, and there’s clutter. A lot of what you clean at this point will stay somewhat clean. You can’t help the clutter but you can live with it.
When the kids reach a certain age, they can make paper chains. My kids loved taking them out front and seeing how far down the block it stretched. And we used to buy new music for the crunch time when they got a bit older than that.
If you can afford to pay for a mother’s helper for a few hours, it will be really worth it. If you can’t and really need help, call the principal of a local BY and find out if there is anyone who can do chesed. Don’t fret about being a chesed case; one day your kids will help someone else, iy”H.
Have a wonderful, happy yom tov!