I ended up wearing a button down dress from Old Navy that I really like. It's not available any more but they seem to keep their wrap and button down dresses well stocked! I've included a couple of those below, along with a couple from Etsy that popped up. Even though I don't shop at ModCloth or JCrew, I checked them for this blog post, and didn't find anything newsworthy.
Vintage Aqua Dress, from Etsy seller JupiterDesigns, Size 12, $11!
Magenta Disco Dress, from Etsy seller RouletteVintage, $26
Old Navy Charmeuse Dress (w/ hidden buttons)
Good luck searching! If you know of any inexpensive dresses for maternity, nursing or just 'gifted' women, leave a comment!