Hi divyasood11,
Since you've already put in some time, it would probably be a good idea to take a FULL-LENGTH CAT so that you can get a sense of your current strengths and weaknesses. There are some things that you learn from taking a CAT that you really can't learn about in any other way (endurance, fatigue, pacing, etc.), so taking one at the beginning of your studies can help you to start training for those other "non-academic" issues. A FULL CAT takes about 4 hours to complete, so make sure that you set aside enough time to do so; anything else that you can do to make the CAT as Test-Like as possible would also help.
GMAT assassins aren't born, they're made,
Rich