I hope that she is full term and breastfeeding baby. This is a common problem in infants. Burp baby after each feed helps. Reminding about the importance of feeding a hungry baby, changing wet diapers, and comforting a baby who is cold and crying as a result of these factors. Soothing music accompanied with parental attention (including eye contact, talking, touching, rocking, walking, and playing) may be effective in some infants and is never harmful. Medicines are not very useful. You may try probiotics like Sporlac. You can try glucose solution also