It's so easy sometimes to do too much without taking a break to recharge.
Right now my wife and I are trying to fix up a second property that we own to sell it. It's a lot of hard work, and I try to help as much as I can, but I've found myself doing too much way too often.
See when you are autistic you need to take more breaks than others. But it often feels bad, because this is only the case when working on something that is not a special interest. And sometimes it can seem like the others (even those who know about autism) are resentful of your need to rest more often. So it's easy to end up in a total fog, unable to think.
It's pretty easy to tell when I'm doing too much. My language skills start to get poor. I'm slow to respond to requests and can't think for myself. Once dinner showed up and was set out for everyone to just grab some when they were hungry. I was sitting down by where the food was and didn't notice the food, or that I was hungry, until my wife told me to eat after the food was half gone.