Anyone else here hasn't seen any change in their breasts since the beginning of pregnancy?

Me
I'm currently 19 weeks pregnant with my first, and when I look at myself in the mirror, I feel like my breasts have not changed at all from before I was pregnant. 
I heard that breasts are the first thing to change, getting bigger, fuller and the nipples getting bigger and darker, but apart from a few more visible veins, they're pretty much the same... 
Is this normal?