I was going to suggest the same thing... my wife works full time and once she understood that doing the groceries was and remains way too much for me, we started doing them online... we either order them and pick them up on our schedule or have them delivered.

Since doing this we tend to have more and better food in the house, though we also grab fast food as there are days when everything is just too much.

Hang in there!

Could you make a designated time, let's say an hour, during the day when you could lay down and rest/sleep? Let's say 1:15 to 2:15. Everyone knows not to bother you with anything. Except of course the house was on fire. I know kids will be going back to school soon, that should help.

I used delivery service and I had two slow cookers. In the morning I would throw chicken of beef with carrots and onions in it and leave if all day doing it'd thing. I also did the potatoes in the mornings. I bought chopped vegs most of the time from the veg section. Although for really dead days I would use a bag of frozen chopped stew veg and throw in frozen beef chunks with water and a stock cube.

Wraps are great for snacks, get ready to go salad and sliced meats, easy and quick and healthy. It's important you get some real healthy food in you to help you have the energy to get through the day.

Fruit like apples, bananas and pears take no prep. Great for snacking and filling up.

By evening when I was wiped completely the dinner was done. Hubby can watch the potatoes and serve up. Not too much to ask.
Take regular naps of 90 mins. You get proper rest that way. Come home from dropping hubby and kids, nap. Prepare evening meal and your lunch, have a cuppa and a nap. Eat lunch wash pots have a nap. Chuck some washing in the machine. Quick tidy round, get kids. Give fruit snacks and juice. Sit and rest.
Go get hubby. Hubby does tea. Kids can sort their school stuff, you rest.
Eat evening meal. Kids go to their rooms to get ready for bed whilst you and hubby rest. Tuck them up in bed, hubby can get stuff together for tomorrow's crock pot in the fridge. Rest together before bed.
I know it's hard I've been there too. The kids will have to restrict after school stuff unless you can get them lifts.
Have a 2 hour family clean up at weekends.
You are not Wonder Woman.
You could make up a daily timetable, everyone knows what is happening when. You can protect your down time then.
It does seem overwhelming to think of planning but believe me it saved me from total melt down, probably saved my relationship too.
If you can afford it then pay a cleaner. I use £18 a week for two hours cleaning. It's been a godsend.
Good luck.

I'm very sorry it's so overwhelming for you right now.

Everyone has offered great ideas.

Get your groceries delivered to start with. Saves all that time, driving and over stimulation too. I did it for a while myself. Once you've done it once, you'll find it easier to do the next time plus you can usually make a master list on the online site, so that the next time isn't so complicated.

Respite. Look for Brain Injury Associations in your area. There are many in Canada. A lot of them (if not most) would offer respite services.

There sometimes comes a time when you need help even though it's really difficult to ask for help.

Thank you everyone for your suggestions. I am so glad I have you all who understand!

I am on a waiting list for our local brain injury services, although it has been a year and they are saying 3-6 months more. It really sucks that no money means no help, we are the ones who need it the most.

I am going to look into the grocery delivery, even if it costs a little more, as you say it is one less thing for me to worry about.

As far as his work, unfortunately carpooling is not and option, he is a territory sales guy so his job is to drive for a living.

I think you do need to parse in time for rest periods. There hasn't been any in your plan so far, has there? Everyone in the house should know this and respect those times for you NOT to be bothered with anything. I think 3 rest periods are in order. Just wind down what your doing and start to consider them part of your day. You certainly can put some things on the back burner and move yourself up to the front burner. It's important, you're important!!