Mom thinks my baby is starving

My four month old baby is very fussy and still wakes a lot at night and only sleeps for cat naps during the day unless contact napping. He has reflux as well. He eats every 2.5 hours during the day. When I give him bottles of breastmilk he usually drinks 6 oz.

My mom and grandma are insisting that I am starving the baby and he needs to start rice cereal and formula. They think that the reason he is so colicky is due to hunger from being breastfed. They also think that it is the reason he is not yet rolling over or sitting independently. My pediatrician is not concerned but we haven’t seen her since our 2 month appointment.

I hate being made to feel like an inadequate mother. What do I do?