You should also be taking
magnesium, this is very important as
magnesium is depleted by Vitamin D. Also, you most likely have low magnesium to start with, unless you eat lots of green leafy veggies like Kale, magnesium will be low. Low magnesium will give you anxiety and when combined with low Vitamin D levels, it can be even more extreme. You should also have your thyroid checked out, as low thyroid hormones can also cause your symptoms.