Hi KatSihm,
I saw your post in the Shared Experience sub-forum - and I'm sorry to hear that Test Day didn't go as well as planned.
Since you've taken the At-home GMAT, the 16-day wait period does NOT apply - meaning that you do not have to wait any specific length of time before taking the GMAT at a Test Center. That having been said, while you might want to schedule that second Test Date soon, 'rushing in' to retake the GMAT might NOT be a great choice.
When these types of score drops occur, the two likely "causes" involve either something that was unrealistic during practice or something that was surprising (or not accounted for) on Test Day. If we don't define - and properly 'fix' - those potential issues that led to the score drop, then you might end up scoring at the same general level. Before we discuss any of those potential issues though, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How did you score on the At-home GMAT (including the Quant and Verbal Scaled Scores?)?
2) How long have you studied? How many hours do you typically study each week?
3) On what dates did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your overall goal score?
5) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich