Hi
TakdirDid you see any repeat questions when you took the practice tests
leading to the GMAT. A few repeat questions could give you an
elevated score. Alternatively, the pressure of the exam or the
external factors(such as the noise) may have caused the decrease
in the Verbal score
As someone has already pointed out, it would be best to get the ESR
for this GMAT score. I would suggest you to then post it on the forum.
The experts on this forum might be able to suggest areas of improvement.
Work on these areas and give the test again with focused preparation on
your weak areas.
If you have not already purchased the GMATPrep bundle (EP1,EP2,QP1),
for more official questions and practice them before your next attempt.
All the best for your preparation. Hope this helps you!