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Janet, my dd1 didn't fall into any of the categories tyou mentioned.
She was 12 whern she first started having symptoms. When I took her to the ER they would check her for pregnancy, an ulcer, her heart,appendicitis, you name it they tested for it. Her doctor even said Does she have a test in school tomorrow? She was a straight A student so I let him know I wasn't happy with that diagnosis.
Her symptoms were excrutiating pain in the middle of her chest and some vomitting of a yellowish gunk.
After 2 years of this, a doctor inthe ER said I think its her gall bladder. He called her doctor at 2 am and said order an U/S of her stomach/upper GI area.
They found gall stones. So at 14, she had her gall bladder removed. Being a pediatric patient they kept her over night. She was back to school and tap dancing classes in 5 days.