Thanks for your query.
Your baby is having acute gastroenteritis
which is mostly viral in nature and takes few days to settle.
Most important is to maintain hydration .
Give oral rehydration solution sip by sip after each loose stool,give coconut water,lemonade,curd,buttermilk,boiled potato,banana,rice porridge in small amounts.
Continue with zinc and also give lactobaccilus for 2 to 3 days.
In case of vomiting antiemetic like domperidone
can be given as per dosage.
Watch for features of dehydration
like lethargy/decreased urine output/increased thirst.
In case symptoms persist get her evaluated by pediatrician
for proper management.
Wishing your child good health.