My 16 week old has been EBF until recently where we have introduced one small bottle a day. He has silent reflux and suspected CMPA so have been eliminating cows milk from my diet for the past 8 weeks. His symptoms gradually got better but has always been very gassy and a little congested. The last two days we have introduced c.100ml of apatmil pepti syneo (on prescription from the Dr) and it looks like his symptoms have flared again. Poor thing is quite congested and uncomfortable lying on his back at nighttime. Could it be that he’s had a reaction to this little amount of formula? I had thought an extensively hydrolysed version would have been ok to introduce? Do I need to continue for a while before going back to the GP? I need to be able to give him a bottle and have had issues with pumping in the past.