Is there something they will give me for anxiety when I'm doing the anterior lumbar interbody fusion?

In Pre-op. After you have spoken to everyone in pre-op, you can request done medication for anxiety if you need it.
Talk to your doctor. Some apprehension or anxiety before a major operation is a normal human reaction. Let your doctor or the assistant know about your concerns. Talking them through may be enough. They can decide if you need something more. The anesthesiologist can give medication on the day of surgery, but only after you have signed all the permission forms (that is for your protection, so that you are alert then).
Pre anesthesia. Ask anesthesia in pre op holding theywill give you something.