We've been nursing for 7 months, most of it smooth sailing. But recently I've been having pain in my right nipple. It gets better after she's nursing for a time, and it's not so bad I want to cry, but it's there. She's got no white spots to indicate thrush, so I don't think that's what it is. The appearance of the nipple is normal, so nothing to indicate anything wrong there. It seems to hurt more at night, also. Any ideas?