My GP phoned today following months of investigations and blood tests into my weird symptoms, which turned out to be due to raised parathyroid levels. They have now found I am severely deficient in Vitamin D! This could explain some or maybe all of my health problems. I do have vitiligo and was advised a few years ago to keep out of the sun. This advice may have resulted in my deficiency. I've now been told to take a supplement and to go out in the sun a lot more! My GP said she will re test my parathyroid levels again after a few months on the supplements to see if indeed my calcium levels return to normal. Fascinating stuff!