Hi Ali,
No need to feel depressed. Many people (who passed) did not do so well on their first couple of mock exam, myself included.
I re-read the PMBOK for the second time, bought extra studying material, and reviewed every single answer in the mock exam. I ended up getting a very satisfactory score in the actual exam.
I think it is the tight deadline that is giving you the stress, is there any chance you can postpone the exam date?