I’m very sorry to hear this. Unfortunately it is not uncommon for Type 1’s and others with autoimmune disorders to develop multiples. As I like to say, once the body gets a taste for attacking itself, it kind of gets a kick out of it and wants to do it again and again.
I was diagnosed with T1 at 16, then developed hypothyroidism at around 35. So far I test negative for celiac, which I’m thankful for because I already have to watch my sodium due to kidney issues, and this would leave me with very little to eat.
Here is an interesting study about what they call Multiple Autoimmune Syndrome (3 or more): http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3150011/