I have been on hormones for about 20 months and am now a nice 36B.
First month on hrt nothing but after that my girls have made there present felt.
My breast have hurt on and off for most of that time.
I no longer sleep on my stomach not only when the girls hurt but all of the time.
It's just so uncomfortable to smash my breast into a mattress.
The buds have never been golf ball sized but get real firm and have hurt off and on.
Right now they (buds) hurt,
yea that means more growth,

and are about 1.5"or 3.81 cm in diameter.