12 Yo with Stomach Pain

Hello, maybe I can offer some help for her.
I learnt acupressure points that helps stomachache.
There are 4 points here, they are 5 cms from the navel ( up and down, left and rights). 5 cms is like your three fingers.
Just poke these points with your pointer or middle finger( you must cut your nails though).
Poke each about 30 seconds. If there is a problem, she will be in pain, but bear it. Repeat until no more pain.
She will pass gas after 5 or 10 minutes.
It does help. I do this in my country. Good luck. May she get better soon.

Ulcer maybe or gastridus? Common kid problem from stress. School is such a battleground for them. I remember food would set it off also when I'd get it. Had to watch what I ate. Glad you are taking her to the doctor

This acute problem could be gas, but then I'd wonder why she was getting problems frequently and often complaining of pain. It could be an ulcer. It could be a food sensitivity (gluten, dairy, eggs are common foods people react to). My older daughter often had constipation, and the younger one frequently complained of tummy aches. It tooks us YEARS and YEARS to find out they both cannot have some foods (like gluten and dairy), and needed to be treated for yeast overgrowth, and to take probiotics.

But two other people I know had frequent tummy aches and for both of them, it was a stomach ulcer.

Acid reflex give her milk when it happens if it help than tums the next time or just give her tums acid reflex is silent upsets belly n going up esophagus it can be silent either ur back can hurt or ur chest can have cramping pain or burning or nothing I get anxiety like feelings n it's acid reflex

when was her LMP? or has she started yet? She could have a hernia or UTI. Is she throwing up? Can she hold food down? is she running a fever? You don't need to answer all those but these are the things the Dr is going to ask so be prepared. Hope she feels better