Hi rockslayer96,
If your Official GMAT is tomorrow, then it's too late to reschedule it (or receive any type of partial refund), but you do have a choice to make.
Each Test-taker is allowed up to 8 total lifetime attempts at the Exam, but this appointment will not count towards that total IF you do not show up to take the Exam. You will still forfeit the Exam fee though. The greater potential benefit would be to take the Exam as scheduled - with the goal of using all of this as a 'trial run' for your second attempt. By taking note of all of the little details of what happens on Test Day, you'll be better able to plan for all of the factors that can impact your next attempt.
Once you have your Unofficial Scores, you can feel free to PM or email me directly and we can discuss the results and how you might best proceed with your studies. For now, you should not do any studying (NO 'cramming' and NO additional CATs/mocks). You would be better served by getting some extra rest, so that you can go into Test Day calm, clear-headed and ready to work.
GMAT assassins aren't born, they're made,
Rich
Contact Rich at: [email protected]