I'm sorry I don't have any advice except to ride it out. Not very helpful I know. I do know what you're going through cause DS was never that good a sleeper to start with and he is waking heaps atm too.

I wonder if she's about to make some kind of developmental leap, like crawl or something? Often sleep goes out the window before a major milestone is reached. If she's already crawling it could be that she actually needs the extra food overnight, even though you're getting heaps in during the day too.

Have you got a good mate or family member that could stay over one night a week and get up to do those feeds for you so you get at least one full nights sleep? I dunno mate but I hope you start to get more unbroken sleep soon