Ibs ? Chrons? Ulcerative colitis?

[mkgirl01]

So I've been having pain in m stomach in the upper middle.... It'll come and go and I will have really bad pain when I have to poop I'll either have diarriah or I'll have little like almost bunny pellets... Sometimes after I eat I'll get the pain.... Also I fart an burp more then normal I have gotten blood work that's normal and a full abdominal ultrasound which looks at pancris gallbladder kidneys spleen liver the artires appendix and it was normal so it's obviously my stomach ....... Does anyone have advice on what it could be



Nervous it's chrons or uc it got better but came bac again I'll feel like I have to go but can't