This doctor (and most) just want to make money off of you. I had severely horrible gallbladder pain attacts about five and a half years ago. I then learned what it was, cleaned up my diet, and then learned about liver flushing, and saved myself thousands of dollars in paying medical bills. Just read the different reciepes for liver flushing, I would suggest the one where you drink a whole bunch of organic apple juice (make sure it has the floaty fiber in it, if you can find it) cleanse, followed by a bunch of olive oil and grapefruit mixed together.
Note, I did not have any more attacks after I cleaned up my diet, basically from whatever I wanted to eat all of the time to maybe one piece of bad stuff per day verses 5 or more bad food choices a day.