drsuefowler,
high serum calcium can cause fatigue. 8.5 to 10.2 is considered normal. And may be normal because your kidneys are in fine shape filtering the excess calcium, which could be raising your creatinine levels.
You might experiment with lowering calcium intate and lowering vitamin d intake. I like to follow labs on everything. I wonder if you could lessen the fatigue without sacrificing that good night's sleep.

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