Under pressure

I’m getting really nervous about tomorrow.
One of the things is that, for the entire time I’ve been awake today, so far, I will be running tomorrow. When I put it in those terms, I can wrap my brain around it and it doesn’t sound encouraging.
In my head I’ve just been picturing it as a regular marathon. An easily manageable four hours. But this is 100km in 14 hours. I HAVE to be done by 7:00 PM or I fail! And my entire year plan is based off of making it.
So, some pressure is happening.
I hope I can sleep tonight.