Just seen this, LongtoothedGran. I had gallstones - biliary colic - about 5 years ago and, as well as my gallbladder being infected, I also became jaundiced. They thought a stone was in the bile duct, so I had an ERCP. To say I was terrified would be an understatement. However, I had a spray at the back of my throat, as well as sedation. I've had sedation before - for a colonoscopy - and, while it relaxes me, I'm always wide awake. I didn't feel a thing when they did the ERCP and was able to view the screen. I didn't have a stone in my bile duct, but one had gone through and the duct had become infected, swollen and blocked - hence the jaundice. The doctor cut the end of the bile duct to allow the infection to drain. All I felt was a slight twinge in my chest when he did it, then it was all over. I couldn't believe I hadn't slept for days because of worrying about it! I didn't get pancreatitis, but had to stay in hospital overnight so they could keep an eye on me, which is procedure. I had my gallbladder removed by keyhole surgery 10 days later and have been fine since. I hope it goes well for you.