I had mine removed last December, never had issue until the evening we had Christmas dinner at gramps. Thought I was having pain from blockage due to the cheese casserole. After 24 hours since pain started, dehydrated, vomiting bile that makes me want to sacrifice babies to lucifer, and delirious from lack of sleep, I said fuck it and had someone drive me to the ER.
Not even five minutes in the door they had me on painkillers hooked up doing an EKG bringing an ultrasounder machine in. Turned out I had a gallstone "twice the size of a golf ball" that wouldn't budge, so i was under the knife not even five hours later. Surgery couldn't go any smoother according to surgeon, and I was out the door the next day with five different pain killer scrips, and pain free. There was a special name for it but the surgery they did to me involved cutting three holes into my midsection and pulling everything out through belly button, where I spent a week and a half draining saline and blood from. Fun to freak people out with actually and I get to convince people I've been shot several times and survived. Pretty sure mine was the result of the heavy minerals in the waters around here.
Good luck, be sure to grab plenty of nurses' ass.