My daughter, 19, has been experiencing pain in her upper stomach, off and on, since November 2006--she saw a specialist who ran every test available thinking it was probably gallstones/gallbladder disease. None of the test every showed anything wrong. Her pain actually subsided for awhile, but in the past week has some back again; last night she had a severe attack (3/19/07): a slow ache that developed into severe lower back pain (she's never experienced this before), & upper middle stomach pain that lasted total for about 3-4 hours; in the past week or so her appetite has greatly decreased and she is nauseaus most of the time. Could there still be a gallbladder problem even though the tests were all o.k.? Or, could these symptoms be another problem; if so what? Thanks for any information you can give!