If your on formula then id try similac sinsitive I have my daughter on it and its the best theing I ever did. id also have your dr run test to see if the baby may have acid reflux. its common and they will put her on a thicken diet and some acid meds. Ive done all of this for my daughter and she is doing so much better! good luck and keep me posted
My dr. had me start putting rice cereal in my sons bottle at 2 weeks old. It helped out alot. Once I switched him to formula, I bought the generic of similac ar (added rice). it helped weigh his food down so he wouldn't spit up so much. i had a rx for zantac but it didn't help.