I think you could go either way, you can get away with a lot when pregnant. If going that maternity route go for something super fashionable. It's not like you'll have to worry if you'll "get to wear it again." This jumpsuit is super fashionable and in style right now. You cat totally dress it up with some jewelry, make-up and the right shoes.
Tart Maternity Michelle Drop Waist Jumpsuit $114.90 can be yours by clicking here
If you don't want to invest in a maternity outfit I strongly suggest considering Eileen Fisher clothing. I know what you're thinking (believe me I have said it out loud) but her clothes are honestly really pretty. Take for example this cobalt blue silk dress. It is a great color, well made, etc. Though it may look a little dowdy on this size two model, it will be stunning with your baby bump. It is also super forgiving and and you might actually wear it again when not pregnant, but rather feeling bloated instead.
Eileen Fisher Dress $185.90, click here