Vitamin D giving me anxiety and insomnia? Magnesium?

My vitamin d was just barely low a few months ago, but I thought I should address it going into the winter (Canada). It is definitely giving me more clarity/motivation, but its also giving me physical anxiety (making me think about things to be anxious about) and causing insomnia. I have read that this could mean I have low magnesium? My magnesium is always within range according to labs, but i also read this might not mean much. In the past, most forms of magnesium have made me feel really low and depressed the following day. Bisglycinate and glycinate also give me anxiety. Feeling stumped in this area! Any ideas or advice? Only taking 1000iu of vitamin d in the am, but I am very VERY sensitive after having a rough time with stimulant medication for adhd.