Have had this issue several times. Kate B gave the best advice. The only thing I would add is getting the powder probiotics for babies at the health food store. Dip you finger in and put in on baby's tongue right before each feeding. This will help baby digest better. Love that gripe water. The benefit over mylacon is you can give it more frequently if needed.
Mom of 7 and many of those with allergies. Chocolate is big gas culprit.