Hi
@Emma_Fisher, that is one big list? There may be some good news there though.
I have read that migraines can be related to gluten intake so on a GFD for long enough might help to reduce migraine frequency.
CD can also be the cause of osteoporosis so hopefully again a GFD have help you improve your bine mineral density.
If you have read Dr Bernstein's book The Diabetes Solution will note that with his diet and insulin regime he managed to reverse his kidney, neuropathy and gastroparesis problems. As gastroparesis is about automonic neuropathy maybe that could apply the postural hypotension in your case.
And, just as an observation, with T1D and diabetic complications,. bile acid problems, undiagnosed CD for ? how long, who would not have symptoms like fibromyalgia.
I hope things improve and please read Dr Bernstein's book !!