MayoClinic therapist put me on this routine to help my fatigue :
Set a timer for 1hr. When it signals,you take a 5min "timeout"... go into a quiet place ((sometimes I go into the bathroom , close the door), close my eyes, clear thoughts. Then resume activity. Reset timer.
At midmorning, noon, mid-afternoon the timeout is 20min break. Sometimes I need to use eye mask and earplugs. Whatever works!!!
The brain craves rest. Needs it to regroup and heal the frenzied message system.
Try anything!!!