I expressed for 6 weeks until my baby got the hang of actually staying awake long enough to feed! And he's still going now.
Try giving a small amount of EBM so bub isn't starving and then offer the boob. And remember that it is almost impossible to attach a distressed baby, so focus on calming her down first and then try attaching!
Lactation day stays and lactation consultants and the ABA and your MCHN are all there to help too (some MCHNs are much better at breastfeeding help than others though).