Reflux or milk allergy?

Ch

Hey mamas! So I have suspected my little one has a milk protein allergy, but the pediatrician (been 3x) does not think that’s it. They are saying it’s reflux, and started him on ranitidine. However, this isn’t working either. He has green, mucousy stools (he’s breastfed solely), eczema on his face, has been spitting up copious amounts EVERY time I feed him. My gut is telling me it’s milk protein allergy, but I also feel rude questioning a pediatrician who literally went to school to take care of my babe. Anyways, if your little one struggled with this, what symptoms did your little one have? Did you just do a trial of no dairy to see if symptoms improved? And looking for dairy free meal ideas!! Thank you!!!! 💙💙