Don't worry about it. It probably was somewhat down to fatigue, but the anticipation can't have helped. Just try to be confident about what you're doing, don't grip the yoke too hard and keep everything smooth.
When it was time for mine, my instructor just turned to me and said "I'm going to get out now.... alright?". Not much time to get tense about it there!
Good luck with it.
Ginger
