You can call it Fear.
It’s more.
It’s the real you, the you that has to do the hard miles, asking the ego-you that one that likes to talk and dream and take chances:
Are you doing the right things now? Do you have the right run-day plan? Can you handle a hilly 87 km effort, maybe pain? Do you really want this run?
Get your preparation, race-day plan and motivation right and your stomach churns less.