Where to begin helping daughter?

While I have Lyme & other TBDs, I don't have a good reason to think my 7yo daughter does.

However, she's been complaining of feeling bad for a few weeks now. Where do I begin trying to find out what's truly going on with her?

She's been allergic to casein since birth with mostly GI pain being the main symptom. Nothing life-threatening. She's tall & skinny. She says her tummy hurts often. She eats a big breakfast every day, usually 2 eggs, cereal w/almond milk, and an apple, but around 10am she's saying she's hungry again. She says she's hungry or thirsty or her tummy just hurts--she's not sure what the feeling is. This discomfort is affecting her moods and ability to manage her emotions, of course.

She sleeps 10hrs/night. She's moderately active. She eats a great diet, mostly gluten-free meals (because of my diet), veggies & fruits & nuts & wild game meats.

I just know if I take her to her pediatrician, they won't know what to do with vague tummy ailments. They'll say she'll outgrow it or whatever. I'm hoping you people on this forum understand non-traditional medicine, etc. What should I do to help her?

my pediatrician mentioned to us Celiac Disease when we told him about my son's many, many tummy aches.
for us, we kind of did the whole thing backwards, turns out. We went to the llmd and had tested for lyme through Igenex before trying to rule other things out with other doctors and tests. But, he had so many symptoms of lyme, that's why we did it that way.

the pediatrician meeting was to fill him in on lyme and for my husband's sake (he wanted a second opinion). when the pediatrician conferred/referred with the Infectious Disease Dr. and showed that doctor the Igenex results (which had only one positive band and one lyme specific band IND) and told symptoms the Infectious Disease Dr. said "lyme". So no Celiac testing was needed for our son.

I bring that all up to explain our situation a little, b/c it is different from yours,
but, that said, I guess all I meant to say, and needed to mention, was maybe celiac? (I read online that it doesn't always have diarrhea, sometimes just stomaches aches/pains, and fatigue, even joint pains.)

I think I contracted Lyme 2 years after her birth.

I can add hot oatmeal to her breakfast. That's one of her favorites.

I've been told that I have both positive genes for gluten troubles, so daughter has at least 50% chance of having trouble w/gluten. I've decreased it a lot in her diet but haven't removed it yet.

I guess I can try to boost her calories w/o adding gluten for a while and see if that seems to help.

Thanks for the ideas.

She's great at taking pills, so I gave her a digestive enzyme pill today before a lunch of buttered rice noodles, turkey & celery. Can I give her a probiotic pill if she can't have casein? If that wouldn't hurt her, I could sure do that.

She's only complained of tummy pain, not any trouble going potty. That's all she can tell me.

Helpful link. Good idea about pointing to the pain. I'll do that.

Thanks!