to be honest that feeling will probably be worse once you get here but not to worry almost anyone would feel this way. As you settle in and school starts everything will fall into place.

I have a friend that just moved to australia for a year, she called me everyday for a week or two. Once she started working and started exploring her new surroundings she couldnt be happier. Just hang in there, those feelings will subside and this will probably wind up being one of your greatest experiences in life.