Just being 9 is tough, it's a hard age. Even though she had a low stress summer, I remember at that age spending most of the summer agonizing because school would start in the fall. Her symptoms could be related. She didn't start losing weight first did she? Please don't take offense, but I had a cousin with full blown anorexia by age 10. Not eating right can lead to all those other stomach problems you mentioned. Secondly, does she drink enough water? Not soda, but water? I get car sick very easily and feel nauseous if I don't get at least 50-60 ounces of water a day. I think IBS people might be more sensitive to slight dehyration, maybe because we already lose a lot of water from the D.I have GERD (reflux) and it can cause me to have days where I have no appetite. It can also sometimes give me gastritis, and during those times I could eat like a horse and never fill up. So yes, she could have GERD, or IBS, or both.If she were my child, I think I'd get a couple more opinions from a couple of different specialists. Also, if you can afford it, see doctors from different hospitals. It has been my experience that if one doctor gives you a diagnoses, there isn't another doctor at that same hospital or practice that will offer a different diagnoses.In the meantime, keep a food and symptom journal. Not only will it help you learn if she has any food sensitivities, it will also give her a sense of control, that she is doing something to help get better. The doctors might be able to better help her if they have a month's worth of symptoms, too. You may also find out some interesting stuff... for example, I found out that eating 5-6 small meals a day really helps me, and that eating some foods in the same day (like corn or tomatoes) will cause me a lot of problems while eating them at different times doesn't usually bother me.Good luck, I hope you find something that helps her.