Talk to Gastroenterologist on Abdominal Pain

mjhe 2 saal se abdominal pain h jo ziada tr left side hoti lekin kabhi kabhi right side or back pr b hoti h. kafi doctors ko dikhaya h but no relief. ultrasound ct scan endoscopy blood test kra chuka hn jo k thk hain Allhumdullilah. blood test me monocytes range thori high h 12% but doctors said k its fine. mene apne symptoms google kia jis se lgta h k shyd IBS hoskta h, kia koi bta skta h k ibs ko diagnose krne ka knsa test hota h ? thanks