Keep the faith, you will do fine. I am 79 years old and have two knee replacements. I hurt so bad before they were done, that it is a pleasure to be able to walk. I got over the knees really fast and then hurt my shoulder and had to have surgery on it soon be two years ago. First knee was done in 2007, second 2008, and shoulder 2009. Gook luck and know that God goes right into that operating room with you.