Some signs that your supply has regulated are: you lose that feeling of fullness in your breasts, and they may feel soft or even empty — your breasts are never truly empty, though! "Empty" breasts are working breasts.
You may stop leaking and feeling let-downs (or feel them but not with the same intensity as before), and if you pump, you may notice that you're not getting as much milk. This typically doesn't mean you're not making enough for your baby, but if you have any concerns, a visit with a lactation professional can ease any concerns.
