No Changes In Breasts...At All...Anyone Else?

🇨🇦Callie🇨🇦 • Pregnant with Baby #2
Hey Mamas!
I'm just under 4 months pregnant with baby 2 and baby looks and sounds great!
However, I weaned my 14 month old son from nursing last month and since then my breasts have gone back to the size they were before I got pregnant the first time. 
With my first pregnancy my breasts got massive in the first trimester and monsterous after I delivered (and I'm a small lady haha). I'm confused why this isn't happening again...
Anyone else have this happen? Or have no breast changes at all in second trimester?