Weight Concerns

Veronica

Today we had our 3.5 month old at the doctors. He weighs 12 lbs 11 oz & is 24.5 inches long. The doctor said he’s a little under weight for his height but wasn’t super concerned about it. But now I’m concerned about it. He typically will drink 3.5 oz every 2 hrs totaling about 30 oz from the time he wakes up & goes to bed. Any other mamas have babies that are healthy/happy but just not putting on the weight? Any suggestions?