Christ on a bike, I'm tired.
Half an hour of sleep here and there during the daytime, just nodding off. Feel like vanishing away to my bed at about midday and staying there until the tiredness retreats. It rarely does. Then fitful sleep throughout the night and wake up every morning feeling more exhausted than the previous night.
Oh I do love my knackered brain 
SOUNDS FAMILIAR. NAPS HAVE GONE FROM 1/2 HOUR TO AROUND 2 HOURS. I WAKE UP NOT KNOWING WHETHER IT'S MORNING OR EVENING ESPECIALLY NOW THERE'S MORE DAYLIGHT.
DISORIENTATING & HORRIBLE BUT CAN'T DO WITHOUT THEM.
Yep, sounds about right!
I know this will sound outragous but if you begin exercising it will help you have more energy.
Oh Me too... I have tried forcing myself into a routine but so far without too much success... My internal clock clearly needs new batteries...
If you happen to stumble across a remedy please bottle it, I'll buy
I have a remedy, it involves a fat pillow and a duvet. And living there
The exercise principle works just fine when motivation and a general blahness in the energy dept is in play and yep it is surprising how energising it can be...
but when that wall hits, suggesting exercise is akin to suggesting taking a quantum physics exam paper whilst riding a unicycle through quicksand in the dark... its just not gonna happen LOL
I vowed never to ride a unicycle, again. The court order forbids it, after the 'incident'
I've resorted to obeying my body's demands which means sleeping from 2am 'til 11am. I do as much exercise & manual exertion as I can manage each day & never nap.
But you, and others like iforget, suffered such catastrophic impacts to the brain that surely the after effects + fatigue will be greater than mine after a SAH.
I do walk as much as I'm able each day which does produce a feeling of well-being/accomplishment and I'm sure helps me sleep at night.
To be honest Andy, I'm surprised you're even alive at all after what happened to your poor head, so best wishes to you, even when you're sleeping ! xx
Fatigue and stuff
Mental fatigue, but no physical fatigue
Winter fatigue 
Sleep patterns !!!
