While I didn't downvote you, you're for sure going to get downvoted. I posted something similar yesterday and was downvoted before I finally just deleted my post. For what it's worth, I am in a very similar boat to you. Scored 81% throughout my Themis course, scored 162/200 on the Themis final, 159 on the Barbri final (I bought a set of Barbri books, used), and have averaged 85% on the Emanuel stuff as well. Lastly, I got all 5's and 6's for my Themis essays. However, similar to you I feel like while I generally know most of the rule statements, I am terrified that I'm going to have bad luck on test day and somehow guess wrong on every single "It's either A or D" question on the exam, botch my essays, and be devastated afterward.

Trust yourself that your correct answers have not been a fluke and you'll do great. I'm trying to keep reminding myself the same thing, hopefully you'll have more luck listening to me.