Hi Farimana,
To start, a 650/Q46 is a solid score (it's just a bit shy of the 75th percentile overall), so it could be enough to get you into your first-choice Business School. As such, a retest might not be necessary. Before we discuss the data in your ESR, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) When are you planning to apply to Business School?
6) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich