Chronic diahrea, urges to go, abdominal pain. Colonoscopy, gastroscopy, stool test, blood test (c-reactive protein, ESR, ferritin) All normal, IBD likely?

Maybe. Trusting you were also checked for gluten enteropathy. I suspect you have functional bowel syndrome. It's mostly organic rather than "nerves" and can be treated. Inflammatory bowel syndrome seems unlikely. Get advice on diet, maybe meds, don't overlook the likely benefits of getting into more physical fitness stuff. Best wishes.