Could be a couple of things. Yes, your breasts may just be levelling out. It could also be a decrease in supply - have you had your period yet? A lot of moms seem to get it around 6 months. Also, there is often a 6 month growth spurt, so his needs might have increased. Finally, a lot of moms who pump so much find that they need to pump EXTRA to get the same amount that just nursing would give them - the stimulation by the pump isn't as good as nursing. You might want to try pumping an extra time at work (if you can). Or you could try taking a "nursing holiday" - take an extra couple of days off (if you can) and just nurse to really stimulate supply. If supply really is the issue too, you could try taking fenugreek and blessed thistle to help production.