Leaving for Savannah tonight at 6:00 and I\'m scared

I'm leaving for Savannah tonight at 6:00. I was feeling fine about the drive yesterday but now I am shaking, anxious and having that stinkin' derealization that goes with the anxiety. My sister asked me if I could meet her a little ways up highway 16 instead of just as soon as I get onto highway 16. Please say a prayer for me.