possible kidney stones, constipation happens a lot with kids, possible parasite it could be a number of things u wont know until she goes in or it simply goes away. hope she feels better soon
Stomach ache can be a symptom of too many things, I used to have a pain in mine when I was about her age ( I'm 25 now ). I saw a doctor and nothing was wrong, he just said that it was from the excess of stress I have. I stll have the pain now but at least I know that it is not a desease . I found though, that cutting out sugar, spices, and all food that causes irritation from my daily meals decreases the pain.
I know that you said you don't have an insurance, but if the pain persists and gets worse maybe you should contact a doctor.
All the best, and I hope she will be getting better in no time.