Too much of polactin shows up as puffy nipples. When you notice a fullness in the aerolas, (the underneath) it's an indicator. As such you'd want to back off the GR, or vitex for the time being.

Don't get me wrong, you want the benefit of prolactin, but all in equal balance. Getting too far ahead of 1 hormone will impede on the growth process. I know, easier said then done right?.