I'm sorry for the symptoms you deal with. Having a diagnosed disease or condition is hard enough but I know well that extra added frustration (and fear) of having unexplained, undiagnosed symptoms and physical issues.
As for me, I have a few physical unexplained physical conditions that impact my life daily, some of them have been going on for almost 20 years. I guess the main ones are low platelet and wbc counts...I get nosebleeds and other bleeding and I believe (doctors have tried to tell me otherwise but I have a HUGE mistrust of doctors now after they've dismissed my concerns or messed me up worse over the years...and a couple times, missed diagnoses that could've cut down on how long I suffered /w stuff like infections). Anyway, the blood issue but MOSTLY it's this almost constant boring, gnawing "hollow" sensation pain in my stomach that started in July of 2003, just out of the blue. I literally woke up with it one morning and it's never resolved OR been explained despite a couple endoscopies, xrays, CT scans, bloodwork, etc. They find 'abnormalities' on these tests but not enough to I guess do anything further to investigate, and they always say those abnormalities wouldn't be the cause of my pain and GI problems. I had one doctor flat out say after all this time they'll never find out what's the cause of this gnawing/boring pain, and 'well you're not dead yet so it can't be anything too bad!" and then actually LAUGH. Then I get told to go to a psychiatrist and that's it's 'psychosomatic'. I KNOW IT'S NOT. But that pain, plus my other diagnosed AND undiagnosed physical issues are the main driving force I'm even on this site.
Chronic pain and no one helping to find out why or do something to at least give temp relief will kill your spirit and will to live pretty quickly, in my experience. And I'm tired out and can't do this anymore, especially with near zero hope that anything will ever get better or a diagnosis found.