well with Behcet's there is an international criteria for diagnosing and you must have certain key symptoms. No one usually has them all. I know of people who have Behcet's who only maybe have inflammation in the eyes (uveitis is a problem for some Behcet's patients). But the thing is, there are many immune system problems which have similar symptoms. I made progress with diagnosis when I saw an immunologist. I would advise speaking to someone in that field. I think your symptoms look auto-immune but what specifically it might be I couldn't say.