Got a doctor appointment next week :/ see if something wrong with my milk. . Little one can't have…

My mother in laws, boyfriends daughters baby had that issue he can't have her milk when they switched to formula for a month he gained almost a pound per week so she thought he was okay and went back to BM and he started throwing up again and losin weight like crazy. She isn't suppose to give him any BM anymore but she still does and he's not doing well on BM. He has a milk allergy and she just refuses to listen to the doctor.

I did I ended up going to formula😔

my daughter was the same way allergic and couldn't have by had to have formula

I had to cut dairy completely out of my diet and my daughter was fine after that