I have breast milk pack in the chiller for about 4 days , which I won't be using already. Can I put them into freezer today ? Or have to discard it ;(

According to this website, freshly expressed breast milk can be stored in the back of the refrigerator for up to 5 days in clean conditions. However, use or freezer storage of the chilled milk within 3 days is optimal. http://www.mayoclinic.org/healthy-lifestyle/infant-and-toddler-health/in-depth/breast-milk-storage/art-20046350?pg=2