As far as I know DS didn't feed for at least 15 hours after birth. He was born just after 7pm and got rushed off to SCBU. I got taken to theatre eventually to be stitched back together and wasn't on the HDU until about midnight. I finally saw DS mid- morningish.
Nobody suggested I try and express overnight and I was in no fit state to have any ideas of my own. SCBU nurse was a cow about it and seemed to dislike me so then everything I did was wrong. She insisted I hold DS a particular way for feeding and it just wasn't working for us. He was eventually let out of SCBU later that day, I continued to struggle to feed and then when I finally got him latched on and feeding I was interrupted because they wanted to move us out of the room we were in and on to the ward - guilt tripped me about it in fact, even though I asked them to wait while I finished the feed.
Went home three or four days later, next day the midwife came out, expressed surprise the hospital hadn't weighed him before discharge, weighed him herself and we were straight back in for a week because he'd lost 12.5%. That was all weird as well as at this point he was clearly feeding well - really well - and they kept making me feed then express, then they'd try and feed him the expressed milk even though he clearly didn't want or need more. The day before they discharged DS they were expressing concern about his lack of weight gain and saying maybe we should try a bottle, then the next day he was fine and had suddenly put on the required amount of weight. The weights they recorded did not add up and it was suggested off the record by one of the midwives that at some point (possibly when he was born!) they'd weighed him wrong.
This was 2013 and it really seemed like nobody knew what anyone else was doing and the advice given to me was often contradictory. And that was with no language barrier and DH and/or my parents there to back me up and ask the questions I didn't think of pretty much constantly through daylight hours.