Before the Vitamin D Council redid their website it use to say this under the magnesium section:
“The Vitamin D Council says that feeling unwell when taking Vitamin D (or getting lots of sun) means that you’re probably deficient in magnesium”.
…Vitamin D has no known side effects. If one experiences any of the following symptoms due to supplementing with vitamin D – or with sun exposure – a magnesium deficiency is most likely the reason why:
* irritability or anxiety
* muscle cramps/twitching
The symptoms of hypercalcemia include:
◾feeling sick or being sick
◾poor appetite or loss of appetite
◾feeling very thirsty
◾passing urine often
◾constipation or diarrhea
◾muscle weakness or pain
I think it is more likely magnesium deficiency but you will have to be the judge.