Janice, I wasn't on crutches or anything when I had the surgery you're having. Mine was in 2009 or so. You're going to do fine, that much I know.
I remember how it happened for me. I woke up one morning and heard a weird sound, like a pop in my knee. It was really strange! I don't remember symptoms before that but there may have been. It was quite awhile ago.
I agree with Anna- it's so much fun to see what magic pops up every day!