Hope you feel better soon! I have been struggling with low vit d for about 2 yrs. Found out today that anyone with allergies or autoimmune disorders should possibly not take vit d 3 supplements. Also vit d 3 is made of lanolin. Are you allergic to lanolin or any or the oils used in vit d? If your calcium levels are elevated your vit d drops in order to protect your body. I could not find your original entry as I am new to this site. Take care Carolyn