Pretty terrible. For most of August I was managing to keep down a banana and some cucumber every day, but two weeks ago that stopped and I haven't really been able to eat at all since. Been through a whole bunch of tests, but all they're really doing is ruling out things yet not narrowing anything down. It doesn't help that some of the tests have a fairly high false negative rate, so you could have what was just tested for and it'll say you don't. At the very least, I can say: no leukemia, no colon cancer, no pancreatic failure, no gallbladder blockage, no liver failure, and no kidney failure. ETA: Oh, and no Crohn's.
This weekend I'm starting antibiotics that will indiscriminately destroy everything inside of me. The side effects are the exact same as my baseline symptoms and user reviews describe it as hell, so I'm pretty excited. I'm hoping that'll do it.