Hi Dear, Welcome to HCM. Understanding your concern. As per your query your toddler have symptoms of intermittent stomach pain, vomiting and fatigue. Well the symptoms you mention in query can occur due to many reasons like food poisoning , food allergy, improper digestion of food, gas , acid reflux , infection of digestive system, stomach flu or colic. Need not to worry. I would suggest you to give child proper rest Give child probiotics. If condition doesn t get better then consult pediatrician for proper examination. Doctor may prescribe antiemetic drug , antibiotics ,analgesic and antacid. You should give her sips of water or other clear fluids, avoid solid foods for a few hours try small amounts of mild foods such as rice and do not give your child foods or drinks caffeine , carbonated beverages , citrus and dairy products. Hope your concern has been resolved. Get Well Soon. Best Wishes,