I appreciate your concern.
is common in infants from 4 weeks upto 4 months of age,we generally have rule of three cries for 3 hours a day,3 times a week,does not persist for more than 3 months of age.
Do not worry,this problem goes as child grows
.i advise you to do proper burping.,keep her in prone position most of the times but she should not be left unattended,regarding your diet you should avoid gas forming food items,
Your baby will be fine.