Hi,
Welcome to health care magic,
You daughter could have food
poisoning what lunch she ate that time.
Now,Food poisoning is nothing but acute
gastroenteritis due to toxins of contaminated food from infections like bacteria, virus,parasite etc.
Symptoms usually starts after 12 to 24 hours of eating,like nausea,vomiting,
abdominal pain,loose motions,fever,weakness,fatigue, headache,abdominal cramps due to water and
electrolyte imbalance.
As per your daughter's symptoms, she seems to be having this gastroenteritis and will require antibiotics, antispasmodics, antiemetics,probiotics and other supportive treatment as per the symptoms.
So,child physician for proper treatment