The LSAT isn't designed to test your law knowledge.
It's designed to test your knowledge and reasoning.
In fact, one guy took it with no preparation and got a 158.
Of course that's not an amazing score, and we recommend you use practice materials to prep for the exam, but it shows that you don't have to worry about it too much.
The Hardest Section
The section most students struggle with the most is the Logic Games/Analytical Reasoning section.
Just like what it sounds like, you basically have to solve a bunch of logic puzzles under big time constraints.
The good news though is: while this is the hardest section at first, it's also the easiest section to improve on because there is a limited number of question patterns you can encounter.
At first it might take you 5, 10, or even 20 minutes to figure out how to organize a problem and solve it, but once you know what methods to use, your score will quickly improve.
You Are Your Biggest Enemy
The experimental section that you get can break you if you're not careful.
If you get an easier Reading Comprehension section, you might feel better about yourself and your overall chances than if you get the harder Logic Games section.
Don't let it get to your head.
Do your best, make sure you're well-rested and hydrated, and take it one section at a time.
Worrying about previous sections means you're not focusing on the section in front of you and that's never good.
The Difficulty Varies From Test to Test
The overall LSAT difficulty varies from year to year and test to test.
If you want to get a 170+, some years you might be able to get there while missing 8 questions, and other years you might be able to squeeze in by missing up to 14 questions (if the exam was significantly more difficulty than on average.)
They "curve" the test to standardize the scores from year to year so while the test might feel harder or easier than the practice tests you took, the only thing that actually matters is how well you do.
I'm sure you've had many times you thought you did poorly and the exam was hard, but you scored well.