Hi Beth! Congratulations on your upcoming marriage!!!

That is very exciting and probably extremely nerve wracking... one thing that may help is, rather than trying to battle the anxiety, just accept that it is going to happen. The anxiety of having anxiety just makes the whole situation worse.
Also, if you feel anxiety coming on, stop, close your eyes, and take a deep breathe. Don't let the stress of moving into the next stage of your life be negative

it is a very happy occasion. Let the stress become excitement! Let the bats become butterflies

(excuse the cheesy use of my username)