How were you diagnosed with Crohn's?

I'm switching GI md's since my previous one (although very nice) not very aggressive at finding solutions. I have been diagnosis with Celiac (confirmed on several biopsy's), Microscopic colitis (again multiple biopsys) with a suspicion of Crohn's or UC. My genetic testing shows I have a predisposition for Crohn's and extremely high SAA level. The last colonoscopy (upset an endoscopy wasn't performed as well) showed some lession or ulcer on my small bowel. He actually had a hard time getting into my small bowel. Unfortunately , the only thing I was told is it wasn't normal and wait until symptoms get bad again. Diarrhea at least 5 - 7 times a day on a good one. All watery or slushy. Pain in the back under the ribcage with burning. Feels like I'm wearing a corset with a heating pad on it. This pain comes whenever I eat or have a bowel movement. Not absorbing again. I was told there was no way to diagnosis Crohns by any test. Is that your experience?