@busymomof7 I found this article. Note it is from 2014 and much research has been done since that time. As an aside it lists a few conditions that cause high vitamin D levels such as various granulomatous diseases (sarcoidosis m tuberculosis), lymphoma, MEN (you can google this, it is a rare disease causing tumors in endocrine glands) and a genetic mutation. The real question I can’t find an answer to is does a vitamin D level of 88 constitute hypervitaminosis. Most of the literature I read states that when high vitamin D levels cause elevated blood calcium fatigue is certainly one of the many symptoms. But I suspect your calcium is normal, or your doctor would be much more concerned.

This article is the first I found stating that elevated vitamin D levels alone can be associated with fatigue. So it is a possibility. So many things cause fatigue. It is a vague symptom. And the possibility always remains that you have more than one process causing your fatigue.

Sorry I couldn’t be of more definitive assistance. The article is a pdf file. I don’t know how to upload it. If you want to read it, go to google scholar. Search:
Article title: Hypervitaminosis D and systematic manifestations: a comprehensive review
Journal: JIMSA
Authors: Gupta, et al
October - December 2014 volume 27 no 4