Hi, bf dc who is 10 days and nipples very sore. Have had the latch checked a couple of times and been told its good, and once she gets going the actual feed isn't painful (which i've been told is a sign she is well-attached) but the first minute or so really hurts. The midwives I've asked said to persevere and eventually they will toughen up, but how long will this take? I'm using lansinoh, trying to keep them dry etc and they haven't really gotten any worse in the past few days but no improvement either. Thanks