Okay, calm down. I know you're worried. Most vet offices have an answering service or have a message that will give you a number to call the vet that's on call after hours for emergencies. If your vet's office doesn't have this, look in the phone book for an emergency vet clinic and make the call. If there's a college or university near you with a veterinary school they will almost always have emergency services, too. Someone will talk to you and ask you to describe what's going on; then they can advise you about what to do or tell you to bring her in to be checked.
After 16 days, I would think that she should be nearly healed; she certainly shouldn't be having any anesthesia related grogginess or side effects.
Keep her quiet. Make sure she has plenty of cool water nearby. Put your hand - gently, gently - over the wound where her dewclaws were removed. Does it feel too warm? That's one sign of an infection. Is it swollen, and is there any colored or thick fluid oozing from the wounds? That's another sign, and being able to describe that will help the vet you talk to.
If she has bandages over the wounds, check them and see how clean they still are. They probably need to be changed, and when you change them, gently wash off her legs with clean, warm water - try not to rub, that'll hurt. Dry them off very gently with a clean towel (the older the better, less lint), then put Neosporin or Betadine on the wounds. If she's licking at the area you'll have to re-bandage it, but try to do it loosely; you'll want some air circulating.