Few days late but theres no point attempting to predict your study score now. Your school may have insanely hard SACs, so your marks may not actually be that bad. What you need to do is clear your head and focus on the exam tomorrow and do the best you can do on that. To that end, I'd say let it go for tonight - watch a TV show, play a game or do something you enjoy and head to bed early so you're really well rested. If you can't do that, just watch some videos on concepts you really struggle with (TMacs legal studies on youtube is fantastic, or edrolo if you have it) and just make very basic dotpoint notes. Possibly see if you can get together with a friend a few days before the exam tomorrow and verbally teach each other parts of the course, but make sure you stop a bit before the exam to clear your head. The biggest thing is to stay in a positive headspace and not tell yourself youre going to fail - because you won't. Best of luck!