Kelly,
I am a positive person but I had reservations prior to surgery, your right to be nervous this is a major major operation, but you have done all the research, you should by now be happy with your surgeon, and what is your alternative Kelly, your hip is not going to get better but you can bet it will get worse.
You will be fine....but just be carefull on what to expect, you may have a flawless recovery and wonder why you ever worried, but also be realistic, you may well have the odd flat day and be frustrated by it all, I know I did but they were few and far between. Try to make sure you have some help at hand early on, my wife was fantastic, although she says I tried to do everything and it would have been easier if I had relaxed and let her do things for me.
I remember a fellow hippie" Todd" saying something to me on day three of my recovery and it is so so relative...he said ENJOY THE SMALL IMPROVEMENTS, he was so right.
Good luck Kelly
Regards
Terry