Baby won't breast feed anymore

Erika
My baby had a really hard time breast feeding early on, we've worked with a lactation consultant and finally got him feeding with a shield. He is now 7 weeks old. We'd breast feed then give him a bottle to top him off. Yesterday we had my parents babysit him all day and now he refuses to BF and screams when I try to feed him, he only will take a bottle. Pretty bummed we worked so hard to get him breastfeeding properly :(