Got locked out of first test…Feeling like a failure

My first test in the program was at 8am yesterday. Was 5 min. late due to MAJOR accident with fatalities. I left an hour EARLY! The instructors locked me out and wouldn’t let me in the exam room. Therefore, I have to take a different version of the test and they automatically deduct 10 points from my grade. I studied for over 24 hours for this test. Has anything like this ever happened to anyone else? Feeling like a total loser, even though it was beyond my control. Ugh.