When people ask me for help, one of the most frequent complaints is of being tired and not having enough energy to do the things they want to do. They also may complain of being overwhelmed and confused. Some use the expression “brain fog” and complain of not being able to think clearly.
The origins of low energy can be physical, emotional or spiritual. I won’t deal with the spiritual here, except to say the phrase that comes to mind is “dark night of the soul…”