Except for right at first when my son was still learning how to latch on properly, we have never had any trouble with breastfeeding. However, when I woke up last night to feed him I had a burning ache along the side of my breast from armpit to nipple. It has gotten a little better over the day, but I'm starting to wonder if I need to do something more than I have been. I've had a hot cloth on it a few times today, and have been feeding my baby more on that side. I thought it might be a plugged duct. Does anyone have some advice for me?