Njl,
Have you tried relaxation techniques? What about breathing techniques? Try to prepare by reducing your anxiety level as much as you can. A hot bath, some soothing music, a warm beverage can help. Tomorrow do sign up for the Panic Diary where you can record your daily level of anxiety. You can also find how helpful it is to use breathing techniques to help you deal with your panic and anxiety. The Panic Program can help you understand more and may help you go about challenging your thoughts.
Hope this helps!
Josie