Her symptoms are similar to those of reflux. Unfortunately with kids they've often felt bad for so long they don't realize it's not a normal feeling. My daughter had severe reflux as a baby. We stopped meds at 4, at 6 she started talking about how things felt. By 9 she was back on meds.
You may want to discuss her symptoms with her doctor. Often they will do a med trial to determine if it helps things. They may also want her to do lifestyle changes like avoiding OJ. But, seeing a doc about it can really help narrow down her symptoms and help her realize if there are more symptoms than she realizes.
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