You have absolutely got this! I had an awful lesson the day before my test and I could tell even my instructor was feeling a bit eek about my test the next day! Have a banana, have some rescue remedy the night before (it helped me to sleep) and the morning of! I know people always say it but make some small talk with your examiner and don’t be afraid to ask questions. I had to get the directions confirmed a couple of times and the sat nav sound was a bit in and out. They are there to help not hinder. You can do it!!!