This has been a huge issue for me since being 8 months off, thought it is slowly improving. I also get "internal itching" along with it where my entire right side will itch inside. So it feels like my organs on the right side of my body are itching like mad. I had an ultrasound done and found out out I have 2 small gallstones, but both doctors I met with didn't feel that the stones were causing the pain b/c my gallbladder was not inflamed at all. It's worth getting your gallbladder checked if it continues one for awhile, but it seems to me that many people experience this exact feeling during w/d and it just might be part of the healing process. I hope it passes soon for you. Taking a hot shower or putting a heating pad on the area helps me sometimes.
All my best,