Please understand that this forum is for getting expert opinion from a medical professional.
Since you have used the word, "apparently", you are unsure of what the cause of abdominal pain is.
It might be a medical cause,or worse, a surgical emergency: on the basis if your single-sentence history, no expert can even make a sensible, logical, reasonable comment!
We cannot assume & treat on the basis of "patient caretaker" assumption, as even adviser (as he claims to be an expert) is morally, ethically liable for expressed advise.
Next Steps
Please seek expert medical opinion at earliest,. y approaching nearest pediatrician.