If you want some cheap comfy maternity bras to get you through until you see what size you end up later on I can recommend the Hestia Sports Maternity ones. They cost about $20. I bought a few early on as I'd gone up a size and they are still fitting nicely due to how stretchy they are (and all the extra clips at the back). I got mine at Big W. They go right up to a 20D.