i have been diagnosed with low vitamin d, i have experienced muscle cramps, hair loss, anxiety. I now take 2000 international units of vitamin d, last night my husband said he could not sleep cause i was twitching so much at night, he has noticed this for several weeks now, i of dont know this, I have woken up in the last few weeks due to severe leg cramps. any information would be helpful. 45 year old female, no kids, no other health issues, and take no meds. could i be taking too much vitamin d? thanks you