Thanks guys for your input - sorry to not have responded. I spent the weekend in NYC - it was amazing, but soooo hot!
I see what you are saying about the shoulder - that is an area I am rather self conscious about, but a size up is too big in the torso and results in some looseness around the chest. Speaking of which, I would definitely wear a cami! I just didn't have one handy at the time.
I was eyeing the wrap style because I thought it might give me a bit of leeway I become more apparently pregnant, but I am thinking maybe I will hold off for a bit for something with a better fit.