hi this info is from breastfeeding basics. com and found just for you. as your pregnancy progresses your milk supply will decrease due to hormonal changes. this may be a dramatic decrease or it may be so gradual that you and the baby hardly notice it. the milk will begin to change over to colostrum sometime during the second trimester. colostrum isn’t as sweet as mature milk so your toddler may not like the taste as much. another change that you may experience is nipple soreness. due to hormonal changes most mothers will experience some degree of nipple tenderness during pregnancy which can make nursing very uncomfortable. nipple soreness is the most common reason given for weaning during pregnancy. do hope this helps you. good luck
while nursing can breast milk dry up if you become pregnant?