Total disaster

I have to share this. I am desperately trying to get it into perspective - some people have real tough stuff going on in their lives, even people I know around me, let alone Syrian refugees and the like - but I'm struggling to manage it. Many of you will know that I am right up against it with my textbook writing deadline. It's been a real struggle for various reasons - it's so 'bitty'; you have to do things according to a very prescriptive set format, which I have to keep checking on; finding appropriate images is a nightmare (can't just search the web etc); the wording of the Spec is really awkward; etc., etc.
Anyway, today was the first time in a while that I managed to get a really good stint at it - not been out all day - essentially worked on it from 10am to 10pm with the odd distraction here and there. Even with that, I was still feeling sick about the amount of slog I need between now and 30th Oct to meet the final final final deadline - same again for the next 9 days basically - though I am looking after the girls from Saturday for the week, and going to Birmingham Sunday-Monday, so not sure how that was going to work. Anyway, guess what I have just done? Overwritten the lot. EVERYTHING I wrote and did today. I feel quite desperate. There's nothing you can say, and there's nothing I can do. I just need to take a walk, have a cigar and a whisky, take a Nytol, and get up tomorrow and do it all over again (at least it should be quicker / easier second time around).