You're definitely an expectant mother when you know exactly when your growing baby graduates from poppy seed to blueberry. I had one of those charts, too. My dad printed and laminated it for me because, you know, dads. I liked having a frame of reference, but it was strange to have my baby compared to an inanimate object. It's also weird to assume a growing fetus is doing adult-like things (because science tells us they can't). It helps to pass the time, though, so yes: there are things your baby is definitely doing in the womb. (And if you think about the few things your fetus is actually doing inside the womb, too, you can definitely start to forget about how swollen your damn ankles are.)
I had a terrible pregnancy. Truly, I wouldn't wish it on my worst enemy. (OK, to be fair, maybe I wish it on Tomi Lahren, but only when I'm at my pettiest, OK?) However, it really helped me to know that my suffering wasn't for naught. Following my baby's progress week by week made the months of nausea more bearable. My morning (read: all day) sickness abated about the time I felt my baby's first kicks. From that point on, even when I was stricken with everything from headaches to hemorrhoids, it was easy to imagine the amazing feats of my tiny, still-growing fetus.
There's a lot going on inside your uterus, pregnant lady. You won't like everything your baby is doing (I'm looking at you, meconium), but you can't help but be impressed. So if you're having a miserable pregnancy, trust me when I say it helps to imagine what your little one is doing in there. Hey, it's only weird if it doesn't work.