I know I can expect my boobs to get bigger once the milk arrives, but will my back size go back to its usual? I'm still in my pre-pregnancy bras at 35 weeks but with back extenders and at the largest setting. Cup size is fine, it's my back that's massive! I've no idea what back size I've gone up to, or what size nursing bras to be looking at. Should I just wait until the baby's here?