i had my girl at 34 weeks and the hand pump was useless until my milk had REALLY come in! i actually found hand expressing best the first few days. keep trying with the pump just to 'stimulate' the milk glands or whatever but stick to what works!
establishing breast feeding is tricky but you can get there. it depends on a lot of factors so it could be different for you, i know we had a lot of trouble so i'll list what you might expect to have trouble with to so you can be prepared

again every situation is different!
getting her to latch on (she didn't seem interested)
dependence on tube feeding (we called it her nose umbilicus because she got all her nutrition through it!) but she did prefer getting it down the tube thanthe hard work
being too sleepy at feeds- staff made us strip her down so she was uncomfortable and would wake up to eat! we started just two feeds every 24 hrs and slowly built up. when she his about 2.8 kg she got a LOT better
wanting to suck, cuing like a mad thing hands in mouth, trying to eat fingers, grizzling etc but when it came to it just not having the energy to maintain a good feed
only taking a small amount each feed so lots of top ups and then expressing after each feed. this is EXHAUSTING. breast feeding AND expressing each time really gets on top of you. plus at home getting up every 3 hrs to express. it is acutlaly less exhausting when your baby is home from hospital than when they are there contrary to how people might make you feel ("ooh just you wait till she's home THEN you'll be tired" that is absolutely wrong! at home you are not worried, you are with your child like nature intended and feeding on demand naturally NOT doing the double whammy, the travel, the extreme worry etc)
on the plus side with hard work you do get there, DD was my first child so i had no idea about positioning etc either so we both had a lot to learn on top of the prem thing. AND she will not take a pacifier or dummy now simply because she hates to suck without reward (milk!) as it is such hard work! haha whats the point of all the energy to suck a dummy when i dont get anything? she thinks. i think this is a positive mainly because i'm not a huge fan of dummies and trying to wean off!
hope that helped

we were only in hospital about 3 weeks, DD is now 6 weeks and still small but fully breast feeding AND i ended up with oversupply from all the expressing so i donate my milk and have a stash to use if needed.
