Boobies question!

GF

Do your breasts return to normal size after you give birth and are done breast feeding?

I’m typically a B, I’m in my first trimester and am reaching a C cup. I’m wondering if I need to invest in new bras for forever more or if I’ll return to normal size next year. Or if they’re gonna keep growing! Do I wait to buy new bras? What if I reach a D and all my C cups are useless? Lol right now I’m still using my B bras and sports bras