Hey SJ, it sounds like you are doing a brilliant job! I am no expert, but I've B'fed two bubs and I used to feed up to 20 minutes per side and then end our feeding session (especially if they weren't really feeding any more). They definitely got enough in that time. I also used to give them a dummy when they just wanted to suck, it worked so well at settling them.

As for expressing, I have no idea how much she'll need sorry, I'm sure someone more knowledgable can help you with that one!

Big pat on the back, you're doing so well