I have Gastropaneisis...it is a slow emptying stomach... My problems sound like your daughter's problem.. Except that my condition was the result of a surgical procedure error that damaged the hairnet like nerves that pulse to empty the stomach... That condition is accompanied by GERD... Mayo MN GI doctors administered a test to time how fast a standard breakfast takes to move along the GI system... My granddaughter has a similar problem...her doctors are at the University of Iowa..