Idk what's wrong

👼👧👶

I'm trying my hardest to hold on to breast feeding for at least 6 months or more and take all of the advice I can but my baby girl who was born in the 33rd percentile for weight, is now is the first percentile for weight. I'm thinking about going to exclusively pumping so that I know how much she is getting so she can start gaining weight. My heart is hurting from this :(