New Lives--latest section lost!

Aaaah! No, no, no, this is bad. The fic I'm currently working on, New Lives, is going slower than the fic I just finished, Consequences. (Which is up on ff.net, and will be here soon.) Anyway, New Lives is a sequal to it and I'm finding it a lot harder to write. So it's going slower. And I sat down to write today and found that the last section I wrote either was never saved or got overwritten somehow. I don't want to have to retype it! I don't even remember exactly what I wrote! I always write a few chapters ahead of what I post, so I have some stuff I can put up this week despite the lost words ... but I hate having a small gap between what I've got posted and what I have on my hard drive. It's a lot less pressure to just get something written if I know I've got some slack to play with if I need it. And the slow writing I've managed with this story so far is not conducive to building more lead time, unless I make the chapters shorter. Which I don't want to do.