Vitamin D intolerance

Hallo. I have a very interesting question...

When I started hormone therapy, they started monitoring my blood counts, including Vitamin D, the level of which is at the lower limit of the norm. My endo prescribed me Vitamin D (Vigantol 1000UI) per day. I tried taking it again, as I had many years before, but this time I had the same problem: after Vitamin D, I feel like a piece of shit. I feel unwell, I can't think straight, I'm tired, I sleep poorly. I told Endo about my problem with vitamin D when it was prescribed to me, to which I received the answer, “Well then don’t take vitamin D.”

Previously, I attributed everything to an overdose, but what kind of overdose can I have with a minimum level? Vitamin D intolerance? Could there be a genetic defect in the absorption of vitamin D? Or such a strong deficiency that the body starts to storm as soon as it receives a dose of the vitamin?

I tried dividing the dosage into two times a day, tried taking 2000UI. But one damn thing, everything is crap and I don't last longer than a couple of weeks.

It is also interesting that my children also do not tolerate Vitamin D well: they are capricious, they sleep poorly.