Biliary colic is the pain associated with stones as they pass.
This pain usually passes, but can recur. When the gallbladder is swollen, with pain, this can be cholecystitis, an inflammation and infection of the gallbladder. This can initially be treated with antibiotics, but usually is an indication for surgery, now done with a laparoscope. CF complicates the issue in that pulmonary function should be optimized before any general anesthetic procedure. Discussion between your CF physician, surgeon and yourself to go over the options is the best approach.