Wow, I had the exact same crash around the exact same tests. It's burnout. Definitely. 27 knocked me out cold with a 163 when I took it the first time. Took it a second time after three or four weeks and got a 178. Take 2-3 days off. I know it's last minute and the test is around the corner, but I PROMISE it will work wonders. And don't be like me and underestimate your progress because of one test -- definitely does more harm than good! After a few days of mental rest, just tell yourself it was a flake and proceed forward. It should all work out okay Good luck!