My breast augmentation is in 5 days and I'm scared. Anything to help me overcome my fears?

Thank you for your question. This is a fear many patients have especially if they have never had surgery. Assuming you are healthy, do not smoke or use drugs, are not taking any diet pills and have no family history of anesthesia complications you should do quite well as long as you have done your homework. Make sure your surgeon is a Board Certified Plastic Surgeon operating in an accredited facility. Make sure your anesthesiologist is a Board Certified Anesthesiologist and not a nurse anesthetist. If you have verified these things, your anesthesia risks should be extremely low. Best of luck.

Anxiety prior to surgery is very normal; its complete elimination is usually not possible. Assuming you have chosen your plastic surgeon carefully, other important "variables" such as anesthesia provider and surgery facility will be selected based on everyone's first priority: safety. This careful selection should give you some peace of mind that you will be safe around the time of surgery. Discuss your specific areas of concerns with your plastic surgeon who will be in the best position to help you calm your nerves.  
I ask my patients to try to be as calm as possible prior to surgery; this “calmness" tends to translate to a smoother postoperative course. You may be able to alleviate some pre operative anxiety with music, exercise, meditation, a glass of wine (if ok with your surgeon), and positive/objective focus on the long term outcome/benefits etc. prior to your procedure.
Generally, patients find that they did “get worked up for nothing” after their recovery is completed.
I hope this helps.