I agree with getting signed off for a week. Even if you just slept for the first day it would help. Actually I wonder if your sleep is being affected by peri menopause?
Honestly this stage is a drudge and the only way to get through it is routine, organisation, and having something to look forward to.
So get a cleaner.
Declutter your house as much as possible and try to make it so everything - even crap - has a place. Miscellaneous crap can go in a basket under the coffee table for example.
Figure out 5 different recipes that work and one or both of you spend one day making 20 dinners for the freezer. Do this once a month. When we were down in the trenches of two jobs/3 kids I would make 3-4 lots of bolognaise, chicken curry, chicken casserole, tomato sauce, beef casserole every 4th sunday and freeze it.
There is nothing wrong with a rotisserie chicken and a bag of salad for dinner with some bread and butter.
Have a takeaway on friday night and do nothing else - just relax.
buy decent coffee so when you wake up in the morning you have a good cup of coffee (or whatever) to look forward to.
Put a huge planner on the wall of your kitchen and put every single thing you need to remember on it - school events, big homeworks, social stuff etc. We had a four month one that took up the whole of the wall - friends still talk about it.
Before you go to bed the two of you should clean up the kitchen/living room, sweep the floor, set the table for breakfast, have the kids put out their clothes and have them put their bags and kit etc by the front door. That really shouldn't take more than 10 minutes from both of you.
At one stage I would make sandwiches on a sunday and freeze them for lunches - no, probably not the best lunch my kids ever had but it made life easier when it was really busy.
use the tumble drier and fold straight from it. Don't bother ironing. If you need to iron things for work, can you send them out? Dh hasn't ironed a shirt since we first had money to spare.
It does get easier.