Could be that's why you're feeling anxious.
Maybe you could remind yourself that it isn't until tomorrow, and for something like this (you've done your Fourth Step, the prep work is done), you can postpone the worrying until tomorrow. Find something to do that will take your mind off it for a while. Maybe go see, or rent, a good movie that will take you to another place for a while. Or meet a friend for lunch or dinner--something purely social.
Just a couple of thoughts--you might have some other ideas that occur to you.