Surprised second trimester and MORE moody

Baby
I'm 14 weeks tomorrow. My first trimester was pretty easy - no morning sickness, no bloating, no raging hormones. In fact, most of the time I didn't feel pregnant. The last week or so I have definitely noticed that I am more emotional. I tend to get disproportionately cranky or bummed out during the day. I've gotten to the point where I just know when I feel that way the only thing to do is take a nap, and I always wake up feeling much better. Which is also strange because I physically felt much more tired during my first trimester. 
I'm not complaining, as I know it comes with the territory, and I'm thankful everything has gone so smoothly so far, but I'm just surprised. I thought hormones were supposed to level out in the second trimester, not be kicked up a notch. Anyone else?