I had legit 3 days to study/prep for the GRE (unexpectedly had to take it & didnt have time to schedule for accomodations either) and i scored a pretty good average (my math was a little low) but i made it into the grad program that was requiring it from me You’ll do great and I’ll keep my fingers crossed for you!!!
My sibling does admission consulting for the Ivies: it all depends on your degree. For example, unless you’re going into a math-heavy field, schools don’t really care about how well you do on the math section because you’re not asking to get a degree in anything close to it. I have dyscalculia and barely passed math for most of my life, and they told me straight up that I should have no trouble with the GRE, so that’s a good sign for you! You’ve got this! 💙
You don’t rly need that much time. I will preface that I am historically a good test taker, but I took half a practice exam the night before the exam while watching my roommates play Call of Duty and got a 310. It is a big step towards grad school, but definitely not a test worth losing sleep over!