That's a good thing. Don't stress about it. Listen to yourself in terms of why you believe you're not functioning like you think you should. I have about 3 to

That's a good thing. Don't stress about it. Listen to yourself in terms of why you believe you're not functioning like you think you should. I have about 3 to 4 hours a day, twice a week, of top-level cognitive bandwidth. That's it. The rest is idle to a degree where I can do shit for brains work and help others. But really heavy load work takes its toll and also takes a lot of mental capacity if the domain i work on is complex, relatively to what just accomplished. Hence context switching is hard. One practical thing is to write a journal with the things you speculate about. Just sentences. Write it down and continue. Write. Continue. It's a good way to have that kind of valve.