Pain around the belly button and history of vomiting could be due to gastroenteritis, appendicitis or renal stones. I would suggest that you consult your doctor for an examination and necessary tests. Your doctor may order blood-work, an ultrasound and an abdominal x-ray to make a diagnosis. Treatment ill depend on the cause. In the meantime it is important that you keep yourself well hydrated. I wish you well, take care.
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