LCSW Testing Anxiety

Hi, folks! I'm about a month out from taking my LCSW exam, and I'm having some trouble feeling confident going into it. Every practice test I've taken since starting to study I've been able to get 70-80% of the questions correct, including the official ASWB practice exam. My supervisor keeps telling me she feels comfortable in my readiness. I just cannot shake the nerves at all. I know I have pretty bad testing anxiety and always feel unprepared for big exams, but it still feels really frustrating to not be able to shake any of the nerves. I wanted to ask if anyone had any suggestions for feeling more confident going into the LCSW exam? Anything you wish someone had told you beforehand?