My son is six weeks old and is doing fine. He eats off of both breasts with problem, and is gaining weight normally. I have to return to work, so I have been pumping at least once a day to have a stockpile. The last few days I have been pumping I will get 4oz. out of one breast and only an ounce out of the other. I use a dual pump. I've tried massaging the breast before pumping, but still the same results. Am I doing something wrong while pumping to get only one ounce from just one breast?