Emergency sat question!

<p>So I didn't realize I was going to take the October SAT subject tests till it was too late so I picked up a standby testing packet assuming it would be okay, but I just checked this afternoon and they no longer do standby testing and only do waitlist. I've heard that if I pay for the November SAT and request a date change at my test center tomorrow it might work, but I don't know what to do. I REALLY need these scores since I am doing ED/EA. What should I do??</p>