Yes, I can relate. There was a time when I was only up and doing stuff for about
4 hours a day. Part of it is due to your kidney disease, too, which I didn't have.
What is your treatment regime? Is your rheumy aware of how fatigued you are and doing anything to help control your disease?
One of the things that helped me sounded really weird when my rheumy proposed it -- he gave me Trazodone to help me sleep! "Help me sleep?", I said, "All I do is sleep!!" But somehow it gave me "deep restorative sleep", which apparently I had been missing and I ended up with more energy overall.
Also you should probably be eating in ways that help your kidneys function, but I don't really know details on what that would be.
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2000DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde