I am very small-chested (AA cup normally) and haven't grown much during pregnancy (still struggling to fill a 32A). Prior to pregnancy I never wore bras for support, but rather to give the illusion of having something there and hence make clothes fit better. During pregnancy I have been wearing sport bras and bralettes in XS. I'm starting to think about ordering stuff I need for my hospital bag, and the local hospital recommends taking two nursing bras. The problem is that I've looked everywhere and nursing bras just don't seem to exist in XS / A cup, except for a couple of very expensive ones from specialty shops. I've tried a few in the smallest size available and they were huge. My question is, do you really need them, or can I get away with a bralette I can pull up/down, at least until I figure out how much bigger I'm likely to get post-birth (I understand you can only tell after your milk has come in) and/or whether I'm going to be BFing longer-term?