Girls, it's just a cry from the soul... I'm so tired, every feeding is…

Girls, it's just a cry from the soul... I'm so tired, every feeding is an outburst and crying, with the baby I have to fight for food so she could eat even a little bit ? She eats 100 grams for 4.5 months already, I'm exhausted, we did a general analysis, the pediatrician said everything is normal, but I don't know what to wish for, last week she didn't gain weight at all, we weigh around 6.300, I don't know what to think or do anymore.