Hi Katie,
Good luck to you! The fear of the unknown is always anxiety provoking, but look at it this way: you are leaving behind old panic, old fears, and starting out fresh! My therapist is trying to instill in me that the past doesn't equal the future. So relax and try to enjoy the ride, the world is a beautiful place out there. You'll be just fine! I bet the cat's will hate the ride more than you. ;)
Lisa