Questions about Crohn's

[Cassw]

Hi. I am wondering does crohns always show on a biopsy by colonoscopy? I have been very ill with all the symptoms and colitis was seen by ct scan and the docs say they think its crohns, just had a colonoscopy and I guess UC didn't show. I have been going through it since the end of December and its really hard. If it doesn't always show by biopsy any suggestions on what my GI may do next? I also have other health problems and 1 of the other main issues is joint pain and fevers,please tell me they go away?At first I was treated with double antibiotics for Diverticulitis and it did not help at all.I have all the bowel and tummy issues possible and several body system issues. Also has any of your doctor's used a CRP blood test for dx help or? Thankyou