Same here. My dad blamed the fact that I'm a vegetarian. He's been told by two GIs that it has nothing to do with it and hasn't said anything since, but I know he still believes it ("No one in my family has any problems..."). Well, no one on my mom's side did either. My sisters are in near-perfect health. In fact, I seem to be the only one in my family who had any big, frequent health problems. I could give you the list, but I don't think this forum could handle it and I'm positive that none of you want a list of all my ailments (you all have your own lists, I'm sure).
But, yeah... My diagnosis is a mystery to me. I can't wait until medical science cracks this riddle not only for the advancements in treatments, but also because I'm just so curious.