If you know you are going to score really bad, you are better off not taking the exam so the score is not on your record. It's also possible that you take the exam, then when you finish do not hit the button to finalize your score. Once you calculate your score on the screen, you cannot go back and undo that. If you do NOT calculate your score, your score will not be calculated and you won't see any score on your report.
This way, it allows you get your $250 worth by taking the exam and you can experience exam-like conditions, but you won't know how you actually did and what you got right or wrong. You won't know your score.
If you feel practice is good for you with no score, then go ahead and try this. Otherwise, it might be better to just reschedule for another time - just keep in mind the new exam begins June 5 and you'll have to spend more time preparing for the integrated reasoning section.
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What's Inside GMAT Pill?
Zeke Lee, GMAT Pill Study Method (Study Less. Score More.)
GMAT Pill Reviews | GMAT PILL Free Practice Test