Congratulations on your new baby! My Granddaughter was VERY gassy and we too had to use the mylecon drops and had the milk changed numerous times. She just threww up everything she ate or if it did stay down the gassy tummy kept us up all night. She was not diagnosed with Cah until 13 months old in adrenal crisis. She will be four next month and still says her tummy hurts her when she drinks her milk. (but she won’t give it up LOL) Maybe just feeding him small amounts at a time and more often (UGH!) I Know !! MIGHT help? Four weeks is just so little him and YOU are going through big adjustments and changes........ Give it some time and stay in tune with your pediatric Dr. hope he feels better soon. Cherry Welcome to the board.... we’re here if you need us!