Week 17 Belly Pic

I don't notice a huge difference between last week's picture and this one, but I do notice a difference between my first picture (at week 13) and this week.  I'm definitely a little thicker in the middle, but it's only noticeable to me and Matt so far. 

Who knows ... maybe one of these days I will actually start looking pregnant?!  My doctor told me at my first appointment that first time moms sometimes don't show until the fourth month.  Well ... I'm almost four and a half months!  When will this belly appear?  I am looking forward to looking pregnant!