Thank you for your query,
Vomiting in your child may be due to viral gastritis
As your child is having stuffy nose , put saline nasal drops into each nostril before feeding.
For vomitings to control, you can give domperidone
drops in prescribed dose.
Give sips of oral rehydration fluids to prevent dehydration
Monitor her hydration, urine output and activity.
If vomitind persist, any signs of dehydration are there, consult the Pediatrician
Hope I have answered your query.