GFR (non-african) is at 122 which is normal, and albumin creatinine ratio is 14 which is also normal; so I think my kidneys are working correctly. I've read about Chronic Fatigue Syndrome before, and it does seem to meet most of my symptoms. Unfortunately it seems like there isn't much settled science around it.
Wikipedia says it can be differentiated from depression by a lack of anhedonia and post-exertion exasperation of symptoms. I'm typically not very happy but this predates the fatigue, I'll try to do some decent aerobic exercise tomorrow morning and a lot of school work (necessarily) to see if I feel worse. If I don't feel worse tomorrow I'll assume I can rule this out.