Mel, get a 3D/4D scan done at 32 weeks then you'll know for sure!!! We did with DD just to double check she was actually a girl LOL!! And because those scans are awesome to see bub's face etc!!
Can't down here - they only do it at one place in Launceston and you have to be getting it done for either a morph scan or a growth scan - neither of which I need!