I just came across this thread and I am ready to answer, but I noticed that you would have a surgery in less that two days so I hope that you found the answers of your questions and now are prepared for the procedure. You will make it, girl!
Don't worry about the outcome, just stay positive. I had three surgeries in a year and the best thing that helped me overcome the great stress of revealing that there was another and another one after each of them was to stay positive.
All the best to you in the forthcoming challenge and I am looking forward to reading from you soon!