Ive been having pain that feels exactly like a gallbladder attack after my gallbladder removal. my ultrasound came back normal. why do i have pain?

IBS: there is many reason to have a biliary colic after having gallbladder surgery,some can be related to the liver,pancreas,or biliary tree and the sphincter of Oddi.the pain could be related to irritable bowels syndrome IBS that can cause pain similar to gallbladder attack. Stay on light diet,keep your bowel regular,multiple small meal,avoid over indulgence with food,hydrate well and relax ,exercise