Hi Divyansh1992,
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 possible 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 long did you study before each of your Official GMATs?
2) What study materials did you use for each attempt?
Goals:
3) What is your overall goal score?
4) When are you planning to apply to Business School?
5) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich