so should I not give her my milk anymore

she does great on the formula but not my milk. I'm feeling discouraged because I really wanted to give this one milk, since I couldn't with my first

More likely they're allergic to something the mother is eating. Dairy, peanuts, or shellfish for example.

anything is possible but it's probably more of an allergy to what the mom is eating or drinking I didn't breast feed so I don't know

It's possible that the baby can be allergic to something the mom is consuming...