GMAT DISASTER....Anyone HELP...I don't know what to do

Hmm, advice I wish I'd had before I booked my GMAT. The post test is on a set date as the class is through the university, so it can't be changed. I obviously can't change my real GMAT either, too expensive. I can skip the essay if I want on the practice test, and just do the IR, Quant and Verbal. I am not worried about the essay, I used to be a history major, I can BS my way through an essay with my eyes closed I suppose I do have the option of skipping the post-test. I mean, it's not like I'm being graded on this class. However, I really want to take it because it's away from my house.

My plan was to not study at all between the post-test and the real deal, so I would have two full days of rest. And I am planning on taking those two days off from everything. In college, I never studied right before a test. I found I did better if I let my brain rest. As an aside, I'm the type who is very impatient, and wants to get this over with, so that's why I scheduled it when I did. I mean, a week later might have been better, but there weren't any slots open where I live for two weeks after the class ended, and I didn't want to wait two weeks, because I'm impatient