I surely understand being nervous, normal! BUT you are going to say to yourself, "why did I not do this sooner?" the discomfort is much less than your daily pain from the arthritis and erosion. Glad you are doing it, it will change your life, you will be mobile and not dependent on wheelchair. How about the other hip, is it bad? My spouse needs new knees and hips, she already had a knee and hip done and will be getting another knee soon. Knee is harder, longer rehab and some more pain but still not much. You will do fine I am sure, just getting on the other side of it is the job now without too much anxiety!