12 weeks boobs seem smaller

Nikki • Wifey to an amazing man, RN, mama 1 beautiful baby girl and 3 fur babies. TTC #2!
I will be 12 Weeks tomorrow and my boobs seem to have gone a little closer to their normal size? Is this normal? I've never really had symptoms and he felt good through the first trimester except for being tired, so of course now I am worried. Anyone else experience something similar?