S.D.
Don't worry about milk production!!! As long as she's gaining as she's supposed to, she's fine. The cool thing about breast milk is that you don't produce more and she doesn't need to take more, it changes as she grows! She will continue to tak 4-8 ounces as she has but it becomes higher in fat, calories, and protein. How cool are our bodies?! I don't know what to tell you about losing the weight, but I do know that as long as you are breast feeding, you don't want to diet too much, it will affect the nutritive value for your baby.
Go to Wild Oats or Sunflower Market and ask for natural ways to increase milk production if you really are worried. If you pump, do you get 3-6 oz out of each side? You are fine! But there are some good natural ways to increase milk supply without needing drugs :)
Good Luck:)
P.S. Check out yahoo groups for local mom's groups: http://dir.groups.yahoo.com/dir/Regional/U.S._States/Indi...
Here's the one I started:
http://groups.yahoo.com/group/BroadRippleMama/