I am sorry to hear about your ill health. Obviously with the complication of your diabetes and other symptoms your condition is quite complex.
You can get large vessel involvement with GCA ( ie Aorta, large arm and leg vessels ). You haven't mentioned who you have seen ( rheumatologist, opthamologist etc ) and whether your symptoms have settled now.
There is a charity called PMRGCAUK who have a helpline, website and also a health unlocked site. The helpline is 0300 111 5090.
Vasculitis UK also have a website, helpline etc, phone no. Is 0300 365 0075.
Both these organisations are excellent and can provide you with further information and advice on specialists in this field.
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