Thank you for posting your query on HCM.
Well looking into your problem I would like to tell you that it can either result from excessive intake of vitamin D in the form of supplememts as it is a fat soluble vitamin and thus its excretion is not as good as other water soluble vitamins
Next think to get tested is Serum parathyroid hormone
(PTH ) level and calcium levels as pararthyroid adenomas present with such manifestation . You should consult an endocrinologist
for the same if the levels are abnormal . Check and stop any kind of supplement that you may be taking having calcium or vitamin D .