Good for you. I studied for the CG in a 2 day prep class - Wed, Thur, due to instructor having a conflict on Friday. But he reserved our room for Friday for those who had traveled from a distance and we held our own 3rd day of prep for the test. It was a mix of CR and CG applicants. So after 3 full days, we tested on Saturday morning 8 - 11....I was the second person to finish but felt fairly confident which turned out. Yes I passed, but didn't learn so for another 10 days or so.
When I got to my truck, I realized I was shaking like a leaf. So made it as far as the next Denny's or some such - ironically only a half block or so away from the AALCB offices at the time. Slogged down a half pot of coffee before heading home. It is stressful and the older you get the more angst I have suffered. I would hate to test anything serious. Your worst is over but never stop learning.