The range of your scores is extreme and obviously not common. The wide range of your scores suggests that some of your high scores were due to luck and that you may not actually know why you got certain questions correct. I also would question whether you were honestly and accurately keeping track of your time. It is very unlikely that if you typically have several minutes to review your work, that on test day, you would not be able to finish any of the sections.Can you do better next time? I think that's something only you can answer. I also recommend stress reduction techniques if the real reason for your lower score was actually panic-related.