What would you have done?

I had a 16 y/o girl present with pale skin, headache, nausea, dilated pupils, sitting b/p 104/70, pulse ox showed mildly tachy (104). Laid her down on the floor of an empty office (I don't have a health room or office.) put her feet up and started pushing fluids. It was right after lunch & she said she had eaten. She said this had happened twice before but that she'd never seen a doctor. I gave her some graham crackers to eat & started calling parents. I told dad I was very close to calling an ambulance.

She improved but would still get sick when sitting up. I told dad when he got there that I was concerned she would pass out if she had to stand or sit up & would feel better if we sent her by ambulance. Dad wasn't too concerned & said she might just be dehydrated. Her color somewhat improved & pupils. I took her out by wheelchair.

I spoke with mom about 4 hours later & she tells me her daughter has hypoglycemia--we have no record of this at school. Mom was just getting home & this young lady is still not feeling well & headache...

I am worried about her & thinking I made the wrong decision not to call an ambulance. Mom doesn't seem concerned but I was very close to calling....