Poison apple - congrats on the new born. And please - you are doing an amazing job.............. keep at it, drink lots of water and EAT !!!!!!! I have had 5 premmies, and using a breast pump was the norm. I expressed for over 5 weeks exclusively with our last little one, and then went onto breast feed for a year. ( I did find it helpfull only feeding on one side per feed) If you really want to breastfeed just get that wee poppet onto the breast, and suckle as frequently as he wants. The stresses of a newborn are huge, so you must just go with it. If it means putting a sign on your door saying - "sorry no visitors today" - just do it. Take the phone off the hook and chillax for a few days. Your supply will pick up.
Keep us posted on your progress
All the best
"never let the truth get in the way of a good story "