Hi, thanks for using healthcare magicVomiting
in children is commonly related to gastroenteritis
which can be due to viral or bacterial infection.
Children are at risk of dehydration
with gastroenteritis if they are not given enough fluids to replace what they are losing.
Weakness can be due either to the infection or fluid loss. If you are not comfortable, it would be best to take her for another assessment.
I hope this helps