Enjoy the pain, because it means that they are growing!
If I have trouble sleeping, the only way I can get to sleep is lying on my stomach. It is very uncomfortable getting them aranged so they don't hurt. Working in the yard with a shovel, sometimes I'll lean on the handle for a bit more leverage. Ouch, mistake!
I realized early on that I needed to wear a sports bra, not just to hide them when in male mode, but to protect the nipples from chafing against my shirt. Now I wear a padded bra for vanity, but the practical reasons still exist. I used to trot down stairs - can't do that any more without a bra. Since I don't like wearing one in the house, I learned to glide down stairs.
It's all good. (Except they don't grow fast enough! 😉 )