I have been successfully breastfeeding my 5 month old little girl since birth, and for the past month (back at work) expressing milk twice a day, and going to her for a midday feed. All has been well up to now, but this morning I was unable to express more than a few drops! I can't understand why? Usual time after her last feed this morning, and I usually have plenty of milk this time of day. Don't know what could have caused this? Now I don't have a bottle for her afternoon feed, and am very worried. Could it be dehydration because I haven't had much water today?