My boyfriend has also suffered from stomach issues for a long time (since way before we were together), but they seem to be getting worse. He saw a doctor in the UK who put him on an elimination diet, called FODMAP. Essentially, it cuts out everything but protein and some vegetables (ie no wheat, no dairy, cuts out a lot of fruit). At the same time he had a blood test, which showed abnormally (worryingly) high uric acid and creatine (indicating, according to the doctor, muscle death). The diet is meant to be 8 weeks long, so we're just getting to the reintroduction stage (which is good!). However, he had another blood test last week and the uric acid and creatine are still high, and he apparently now has high bilirubin, which is a by product of blood breakdown. The doctor at our health services is now very worried about his kidneys and has referred him to a kidney specialist for an ultrasound. He's going to have that on Friday. It would be really really tough on us and him if there was something serious. I really doubt there is, as this thing's never showed up on any previous blood tests, but it's still nerve wracking (and obviously kidney's are pretty important).
Anyway, as usual, I feel like I'm completely in the epicenter of all this stuff. I'm really hoping that all my sisters issues get resolved soon, and also that this whole thing with the boyfriend turns out to be not as serious as everyone seems to think it is at the moment :S.