How many times should I feed my brand new baby (breastfeeding)? She fed 4 times in first 4 hrs or so then again at about 12 hrs old, but other than that she seems happy sleeping and has slept for most of the last 12 hrs! Also my nipples are incredibly sore (think her latch may be too shallow), so I guess I'm happy to give them a bit of a break... But I'm worried about her getting enough to eat/ stay hydrated...