I'm going to a graduation in Sweden in June, so it will be warm (hopefully 25 Celsius or above). I am breastfeeding so need a nursing friendly dress but don't want to spend the earth! Also don't want one which is also maternity and end up with a sag around the tummy!! Any tips on where to shop?! DD is 4 months old so don't fancy the idea of dragging her around loads of shops...