Try oleander - you can make it yourself at home for only pennies and it appears to be effective against just about any kind of autoimmune disease. That and a good diet (which addresses the low B12 and calcium as well as other vital vitamins, minerals and other essential nutrients) and lifestyle may work wonders for you.
You also might consider a good parasite and overall cleansing and detox program along with some probiotics to help elminate any toxins and parasites and enable you body to better absorb and utilize the nutrients you do get. Don't forget about iodine.