I've never been particularly blessed in the chest department; I hoped it would change during pregnancy, but it didn't. But now, after my second, my pre-baby B/C cups that ballooned to DDs are now AAs. Forget spaniels ears, they resemble haribo fried eggs (other sweet brands are available!). GIVE ME MY BOOBS BACK!!!!
Actually, I discovered mine after childbirth! I was always a straight up and down person (athletic build in OLD terms!). I breastfed two children and although I'm far from busty, I'm a perky 30E in my fifties.
I find a good bra helps gather up what you have and keep it in place.