milk allergy/ sensitivity

doc originally diagnosed him with GERD (reflux) bc if his frequent & heavy spit ups but now he’s conditioned/ gassy always crying & upset hardly sleeps & i think these are rashes in his face. can hardly tell difference between that & baby acne. he’s so hard to deal with. he is already on Enfmail AR & liquid zantac from doc. nothing seems to help over a week. i’m going to doc on friday with him but does this seem like a milk allergy ?