The culmination of months / years of progressively feeling more and more tired. Whether this is part of the same thing or not, it has galvanised me to try find out if there is an underlying cause, or if I'm just old.
Blood tests came back. Low Vitamin D, but nothing else. Have to take supplements. Guess I'm just old.
Not really resolved. Vit D supplements may have helped. Just think I'm getting old. It's shit.