How do I prepare myself for my puppy's spay?

I'm really worried about it. She's the first dog I've ever had. She's a miniature schnauzer. I guess what I'm asking is what do I expect? How do I prepare? I planned it during Spring Break, and I'm taking off a few days of work. I've heard Spay's are worse than neutering, but I really want to get her spayed! I don't want any unwanted pregnancies, it's mean and i'm no BYB!