Is it possible for you to see a gastroenteritis?
First of all, quite a few of my tests came back as normal. I had the Serology 7 done to check specifically for Crohn's, and it was negative. My Small Bowel Follow Through was normal. I had an upper endoscopy and colonoscopy done and although they DID find inflammation in several areas, the biopsies were all negative for Crohn's. Finally, I did the pill camera and that got me the diagnosis.
You know when something isn't right. It is hard and very frustrating but I would seek another doctor and a gastroenterologist, if you haven't already. I ended up seeing two different GIs and I have eye inflammation from this disease that I am trying to get under control. I have seem numerous eye doctors for that by itself.
Take care and I hope you get some answers soon!