I don't know how or when exactly this came to be (I've been breast feeding for 6 months now), but since I've been back at work for the last month my right side is producing 1 - 2 ounces and the left anywhere from 2 - 4 when I pump. When I nurse her she now has a preference for the left, so it may be perpetuating the problem. At night I feel empty on the right and engorged on the left. I try to get her to feed as much on the right, but nothing's changed-- I may just be giving in an favoring the left now, too. Any suggestions?