Yes this is the problem for few days . But try to give breast feeds every 2 hrs and for 10 minutes on each breast and in between feed the baby whenever she crying . But you must also take healthy diet so that breast milk will be enough you will not feel weak. Diet should be rich in calcium. I hope it will solve your problem . Don't be tense when you are feeding and try to look at your baby and touch her lovingly to increase the milk in breast.