What can I do for my anxiety before surgery?

Talk to your Doctor. You didn't mention what type of surgery and whether this was elective or not. It is important that you communicate your concerns with your surgeon. He/she can then determine whether these are normal preoperative fears and concerns or whether this represents something more and recommend treatment or referral.
Talk with doctor. There are some meds than can be prescribed and decrease the anxiety level prior surgery. Talk with your doctor and I am sure he will help you:) good luck!