Presley will be fine. Try not to stress out too much about it. It's the right thing that you are doing and within a week or two after the surgery you will see Presley back to her old self completely. The pain should only last a day or so. By the third day I am sure you'll have to be reminding Presley that she still has sutures and she can't run and jump as much as she wants to. She'll be ready and rearing to go

I do understand your nervousness, but she'll be fine.