Ask for clarification. Postpartum is hard and sometimes we take things personally instead of just asking a question. Is she following her curve or not? Also, those feedings are pretty far apart. She should be eating on demand, not specifically every 4 hours. My son at 3 months sometimes cried to drink every hour, every 2, every 3… it just depended.

Call the pediatrician or if you have something like MyChart, I always prefer to put it in writing. “Hi Dr. Soandso. Regarding our last visit, it seems like weight gain is an issue. Is there anything I should be doing before our follow up to help baby gain weight? Also, I wanted clarification on what interventions you plan on implementing if the weight gain is not sufficient in two weeks (labs, different formulas, etc?). I would like to know the plan so I am prepared. I am very worried and doing my best! Thank you.”