Hi PazJaime,
Currently, the 16-day waiting period only impacts your ability to schedule the GMAT at Test Centers (re: the At-home GMAT can be scheduled at any time relative to Test Center appointments). Since you're interested in retesting so quickly, I'm concerned that you want to 'rush' back in to retest when you might not actually be ready to hit your Goal Score yet.
Before I can offer you any additional advice for your studies, 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 your 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) What study materials have you used so far?
4) 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:
5) What is your overall goal score?
6) 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