In the initial days after your baby’s birth, your body produces pre-milk. In many women it is thick and yellowish in color and for others it is thick and watery. After 3 – 4 days, your breast becomes firmer which indicates that more milk is being produced which is now changing into breast milk. Sometimes it takes longer than a few days, but you don’t need to worry, it is absolutely normal, but do let your doctor know about it.