Hi Pulkit3622,
Currently, there is no fee to reschedule your Official Test Date - so if you are genuinely concerned (or are not feeling ready for the Official GMAT), then you might want to push back your Test Date (even if it's just for a couple of weeks) so that you can solidify your knowledge and get some extra practice in.
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:
1) How long have you studied? How many hours do you typically study each week?
2) What study materials have you used so far?
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)?
4) 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