I took eglonyl to increase milk supply for breastfeeding. the baby now has swollen and hard breasts. i have stopped taking the eglonyl. is this a normal side effect?

Age ?: Occasionally a newborn of either gender will have nipple/breast enlargement from hormones you passed through the placenta. While attached, the placenta also removes the hormone but once clamped, some may stay behind for a while with this effect, increasing/fading over a period of weeks. Looking at the ingredients of that item I don't think it has anything to do with this.