Anxiety taking over :(

I am taking the LSAT- Flex next Tuesday. Though I have scored a 165 on PTs, since then I have been scoring dramatically low for my standards (150s). I think this is because of my anxiety and overthinking. I have been approved for accommodations, but my brain still isn't making this easy. In other words, I know I can do well, but am I getting in my own way/ how do I stop that?? Please help :( I am very stressed