Maybe try a calming tea, your in the best place to find teas...
That would be my suggestion to get you into relaxation, but I liked what
Karen/ getting by said, get a camera, if you don't have one and start taking pictures
and don't forget to get pictures of your students, so you can remember them.
This will be a great learning experience for you, so proud of what your doing, we are rooting
for you, you can make it...try saying that to yourself "I can Make it" and "I'm
doing a great job".
Don't sell yourself short, your doing a great job, believe it...
Many well wishes to you and keep us posted.