(((((Indie's OK))))))

From what I remember you haven't been working this job for very long. Doing anything new can create anxiety. The one thing all people have a hard time with is Change. And yes, you can get anxious in anticipation, doing, and finalizing the day.
And it can be tiring, anxiety can just wipe you out. What you have to learn to do is find a way to just get more comfortable with the routine and the anxiety will ease up.
You are after all in a quick service job and are under pressure to hurry up quick and get someone whatever they are asking for. And if I remember you have not been doing this for very long and in training you felt a lot of pressure.

Remember learning how to tie your shoe laces? You don't have to think about it now, you just do it. Well that is what your work will end up being like. You will finally get into a rythem and wont have to concentrate so much. It is actually good for your brain to learn how to hum along quickly. This may not be the dream job of your future, but it puts money in your pocket and stimulates your brain and your in motion too, that is always good.

Ease up on yourself and try to relax into the rythum of the job, it will come.

Open Eyes