Please consult your gynecologists for latching issue as it's a very common issue in the first few days after delivery . Breast size, nipple's shape, baby position, mother's sitting position, privacy,so many issues involved. If nothing is fine, baby is going to have latching issue leading to not able to get milk, dehydration, leading to fever in Baby, mother gets breast engorgement pain,abscess and so on. Please consult your doctor,get help of lactational specialist if they come to your doctor s hospital.