For sure check out number2.com. I just took the test like 30 minutes ago, and used that the last week of my studying, helped a lot. I don't think you need to reschedule the test, based on the fact that its all really test taking techniques. Know how to lay out your scrap paper for quant questions, etc. I don't know much about the Kaplan books, but I used Princeton Review Cracking the GRE and I think it helped a lot, mainly with test taking strategies as I mentioned. People say that the Princeton Review is for people that want to get in the 500-600 range, but I scored above 700 (my personal target range), so I really recommend it. Good luck!
