Hi and welcome to HCM.
It seems like you have postcholecystectomy syndrome and this isnt uncommon. Colestimarin may be helpful and you shoul take it but its effect depends from man to man. You should try to treat it by cahnging dieatry habbits first.Avoid hard food,alcohol and fats. ALso you might have IBD
or stomach issue,it shoulkd be evaluated by endoscopic procedures,gastroscopy and colonoscopy
,ther eis no other way to confirm the diagnosis.
Wish you good health