Kellymom.com is a good website to check out... it was a lifesaver for me (and no, I'm not related to the website owner). I used More Milk Plus from motherlove.com - it saved my nursing relationship several times for me. Also in my community there's a Amazing Newborn clinic once a wk where they can do weight checks and an LC is available for help, they were wonderful in helping me get my son's latch corrected.
As you pump and nurse, your supply should bounce back up. Nursing is a supply-demand situation. It might take 2-3 days to get full effect. One thing I did - at night my son didn't want to nurse both sides so I'd end up w/ 1 deflated and 1 bursting and leaking
so while he nursed on 1, I pumped on the other and ended up with several ounces to stick in the fridge for later (and he nursed better... the noise of my medela PISA kept him awake longer
You are hopefully using a double electric pump like the Medela PISA? they tend to work better than smaller electrics or a hand pump. If its medela, after 2-3 mos you need to change the little white membranes, Babies R Us and Target carry them, you can also order online at their website. If you can't afford a brand new PISA, you might have luck on ebay or craigslist with a new or slightly used system.
Feel free to email me direct if you want. Put "PE Forum milk supply" on subject line so I don't think its spam.
2005: PE/IUGR pregnancy with Daughter, born 40+2 induction. Diagnosed with Sensory Processing Disorder (or Sensory Integration Dysfunction) in 2010. Diagnosed with ADHD in 2011. It's getting better with OT and treatment!
2009: PIH pregnancy with Son, born 38+5. Diagnosed in 2011 as Developmental Language Delays, Social-Emotional-Communication Delays. More testing Nov. 2011.
2011: I'm undergoing neurological testing. Praying for the best!