I am going thrue the same thing,about a month ago i went to th E.R with the same thing and they said they could not see anything in the ex rays or the ultrasound .to go back if the pain persisted.
Thanks for the help I am just trying to see if anyone else has had the same pain in the same place she is one of those people who won't go unless she has to she use to have this pain but it just started again after about a year without any pain.
Sounds like it still could be her gallbladder, regardless something is causing her pain and I would see a GI doctor and get checked out as there are a number of things that can cause this type of pain.