Stop for a minute and think " what is the worse thing that could happen?" You will not die from anxiety, it may not go as smooth as you would like or you may have a splendid time if you kick that anixety to the curb.
We often waste way too much of our time and energy focusing on what we don't like, what we're worried about, or what we think needs to be fixed, changed, or enhanced.
There are great things happening in your life and around you all the time.
Celebrate the good stuff around you, in others, and in yourself.
Have a good time and big breaths, nice and easy.