Hi
Thanks for your query.
Your baby is having
acute gastritis which could be due to viral infection or
indigestion due to change in feeding pattern.
Crying is due to colic.
Most important is to maintain hydration.
I suggest you to get her evaluated by
pediatrician as she needs antiemetic like
domperidone and some antispasmodic.
In the meantime give oral rehydration solution sip by sip,give coconut water,lemon water in small amount.Do not force her to eat.
Wishing your baby speedy recovery.
God bless.