Look up ursodiol, probably the medication prescribed to dissolve gallstones. It's real, just slow, so only a later scan will tell if they shrank. Fast weight loss on mounjaro can cause stones to form or make existing ones troublesome, hence the genuine pancreatitis risk. Your endo was aware of the gallstones and recommended mounjaro anyway, so you're not in unexplored territory. Certain people start glp-1s despite having gallstones, watched closely with an ultrasound every few months. Have your doctor outline a game plan that does not need surgery immediately, as taking out a gallbladder isn't trivial and the stones could remain silent when loss is gradual.