This time next week, it'll all be over. In fact, this time next week I'll be at chorus, where my fellow singers will be raising a bit more money with a charity raffle and book sale in aid of the Wegener's Trust. When the marathon gets too much, I am going to think about how utterly shameful it would be to walk into rehearsal on Tuesday next week, knowing that people have sponsored me and donated raffle prizes and brought along books to sell and will be buying raffle tickets, and say, 'Thank you for all this, but I didn't actually finish the race.'
Likewise, how could I look at my mother, who's so often held the fort at home while I've run, or at The Bride, who's coming from Taunton a fortnight before her wedding to shout at me from the sidelines, or James and the children, who've waved me off on my long Sunday runs for what seems like an eternity now? Or my friend R, who, with a million other calls on her time, is coming to cheer me on, or my parents-in-law, who are coming to care for the children so that James can see me off? Or any of the people, friends and strangers, who've sponsored me, asked questions, left comments on the blog, or simply said, 'Well done?' I won't deserve all that if I don't finish.
I have to finish. I have worked so hard for so many months now. I've run in the dark when it's been impossible to run in the day. I've run in rain and cold, after nights of less than five hours' sleep, at weekends when I'd have given anything in my power to stay at home with James and the children. I've done the long runs, I've read books, I've taken advice. But the fact is that I haven't done enough. I'm terrified it's going to be hot on Sunday. I'm scared I won't make it past twenty one miles, the furthest I've ever run in one go. I'm worried that I just don't have it in me to do this thing. In a funny kind of way, the taper isn't doing me any favours. I never feel like going for a run - it's always a real battle with myself to get out there and get going - but the first three miles are always the hardest. Now, with the runs being shorter, I do the difficult bit without really settling into the run. But it's so good to be back in tens of minutes rather than in hours, to set off knowing that I'll be home soon. The training programme has two more runs - a five mile one and a three mile one. It doesn't seem like enough.
On the plus side, we're on holiday in Cornwall, which is making it extraordinarily easy to follow all the advice about eating plenty of carbohydrates in the days before the race. Clotted cream scones, fish and chips, ice cream, treats from the bakery in the village, the odd glass of red wine. And rest. Even though the nights are quite broken, the days are relaxed. DVDs, walks to the village, sandcastles on the beach, stories on the sofa, lots of laughing. Lots of happy images to think about when the going gets tough.
At the end of the day, those images are why I'm doing this. Funding research, raising awareness, all the drama of setting up a charity and training for a marathon - it all comes down to watching three little children dancing on the sand, chasing the waves with their daddy, who's holding the baby in his arms.