Another nurse with an 11 month old bubba who also loves his boobies too. I've been back at work for two weeks now and I know exactly what you mean about not being able to stop work to express. We are entitled to lactation breaks but it is finding the time to do it. I'm expressing twice on an evening shift (afternoon tea and dinner time or inbetween afternoon/dinner and just before home) and once on a morning shift and feeding him as soon as I pick him up. I am very lucky and work on a maternity ward so I have pumps available and the girls I work with are really understanding but I feel like I am not carrying my weight so I am using half my breaks and half work time to express. It seems to be working ok but to be honest I am really struggling to keep up and I don't think I am going to last long as I just don't express much unfortunately. I'm hoping I can make it another two weeks and then I am going to start using cows milk too.
Best of luck and I hope someone can hop on and give us both some helpful tips.