My son is 3 weeks 4 days old and for the past day or so he has been extra fussy and grunting a lot. He seems to be very uncomfortable...especially last night, he did not stay in the crib for more than an hour at a time. He isn't crying much, but just seems very uncomfortable. Do you think switching formula would help? He is currently on Similac Advance and I was thinking of getting Similac Sensitive. TIA!
Quick addition: As my husband is feeding him, it seems as though he is struggling to burp...holds his breath...grunts and whines while trying to be burped.