It sounds like what Nancy has advised you to do is about the only thing that you can do right now. Talking to your doctor I'm sure will enlighten you and hopefully put you at ease with what is happening with James.
That's outstanding that breastfeeding and the weight gain is going well. That was especially difficult for me after delivering my son. I too had a really LOUSY birth experience. Had this wonderful birthing plan that was "au natural" and ended up with what seemed like 40 gallons of Mag/Pitocin, 21 1/2 hours labor (4 of which were pushing), forceps, a 4th degree tear than took over an hour to repair and 6 days in the hospital. My birthing plan was given back to me and I was told it would be great in my scrapbook. But, that's the way it goes and I am just so thankful that I have my health and a healthy baby. Though it seemed traumatic to me at the time, reading the stories here gives me a new perspective on what is true tragedy and the passage of time has helped me to move on and not dwell on the negativity of my labor.
Just know that there is nothing that you did wrong in any of this. You sound like you are doing remarkably well all things considered. Hopefully the continued nursing and supplements will improve the anemia. From what I have heard, the iron in breastmilk is absorbed in greater quantites than that of formula, so know that you are doing the best thing you can for your little one. Oh, and don't fret about not being able to pump much yet. Your body produces enough for your baby and a 6 1/2 oz. baby will probably not really eat more than a couple of ounces at a time, so the seemingly small quantity that you are pumping is right on. You'll be able to pump more as James gets older and heavier!!! Hang in there![:)]
DS-Evan, 7/19/2003. PE at 40 weeks