I live in stretchy pants and leggins with long shirts over the top. I also got some maxi dresses for the hot weather, when choosing I would get some Maternity Stuff (same from K-Mart) but I would also look in the normal clothes as well and get something a couple of sizes bigger that is a bit more "floaty" around the belly or is made of stretchy material. I probably have about 80% of my maternity wardrobe as stuff I can wear after the babies are born.

I found with DD that this really worked after she was born as well to cover my mummy tummy and big boobies for a little while as well. Have fun shopping.