Thank you for your query on Healthcare Magic.
Variation in infants stool color is normal.
If the stool is not loose watery and not foul smelling, nothing to worry.
But exclusive breastfeeding
till the age of 6 months is the best method of feeding your child.
Lot of pain and crying is due to evening colic
which is common in infants around this age group and it can be managed by decolic drops in prescribed dose.
If the child is crying with pain hold the child tummy against the mother shoulder or gently massage
on infant tummy.
Hope I have answered your query.