Hi lovikansal,
I'm sorry to hear that Test Day didn't go as well as planned. 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. 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:
1) Is this your 1st attempt at the Official GMAT? If you've taken the GMAT before, then how did you score on your prior attempt(s)?
2) Over the last 3 months, how many hours did you typically study each week?
3) Have you taken any other CATs/mocks besides the ones that you listed in this post?
4) When are you planning to apply to Business School and what Schools are you planning to apply to?
If you took your Official GMAT at a Test Center, then you might also choose to purchase the Enhanced Score Report. While the ESR doesn’t provide a lot of information, there are usually a few data points that we can use to define what went wrong on Test Day (and what you should work on to score higher). If you purchase the ESR, then I'll be happy to analyze it for you.
GMAT assassins aren't born, they're made,
Rich
Contact Rich at: Rich.C@empowergmat.com