Meech, You might find this interesting.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2931619/
Have you seen an endocrinologist lately? Have you had your electrolytes (all of them, including magnesium and phosphorus) checked lately?
Besides that article, there are dozens more on Polyglandular syndromes.
I'm really sorry you're going through so much!!
Annie