Hi inderbajwa93,
To start, having to guess on the last 4 Verbal questions would not have been enough on its own to have caused your drop in Verbal Scaled Score. Also, since you took the GMAT today, you'll have to wait 16 days to take it again (so taking it in 10 days is not possible). Before you rush in to retake the GMAT, I'd like to know more about how you took these CATs...
When you took your CATs:
1) Did you take the ENTIRE CAT (including the Essay and IR sections)?
2) Did you take them at home?
3) Did you take them at the same time of day as your Official GMAT?
4) Did you ever do ANYTHING during your CATs that you couldn't do on Test Day (pause the CAT, skip sections, take longer breaks, etc.)?
5) Did you ever take a CAT more than once?
GMAT assassins aren't born, they're made,
Rich