Hello A.,
L. the lactation consultant, here.
It sounds like you've done a great job of establishing your milk supply. That's wonderful! You mention that you're sure your baby is getting enough.
If you are breastfeeding exclusively (not feeding formula or other supplements), your baby is gaining well - at the rate of 6 or so ounces a week, wetting at least 6 diapers, having at least 3 - 4 good sized yellow,"seedy", runny bowel movements in a 24 hour period and seems content most of the time between feedings, your milk supply is most likely fine. Hint: to determine how "wet" a diaper should be, try pouring 3 tablespoons of water into a diaper. That's considered the equivalent of a "wet" diaper. Bowel movements should be at least the size of a poker chip.
Breastfeeding is mother nature's best example of supply and demand. The more your baby breastfeeds, the more milk you produce. Breastfeed when baby asks and you'll have plenty of milk as he grows older. Allow baby to breastfeed approximately 20 minutes on one breast and the offer the other. Allow baby to determine how long to brestfeed on the second breast.
It makes sense that your body is not producing much additional milk, since your body produces what your baby needs, so you're not getting much, if anything, if you pump following feedings. That's normal. It sounds like it's time to stop pumping after feedings, and just breastfeed. Try to relax and enjoy this time with your new son.
For mothers trying to establish a milk supply, renting a hospital grade pump is the best option. The Lactina or Symphony is available for rental through our practice as well as through many other resources, such as Simply Mom's at Baylor University Medical Center and others.
Once a mother's milk supply is established, (at about 4 - 6 weeks) a "purchased" pump like the Pump in Style works well. If you plan to return to work or school, you'll need to pump in order to continue providing your milk for your baby. When do you plan to return to work/school?
Happy mothering!
L.