It is really diffucult to predict one's performance based on the prep material used. I do not want to demotivate you, but i would not have felt comfortable taking the test in 3 days without a good mock test score . I will recommend you to take GMATPrep test (the official mock CAT from mba.com)or Manhattan GMAT
Mock Test. Take the complete test (including AWAs) and check where you stand. Score on GMATPrep is very close to the actual one you get.
All The Best and let me know who you fared on the G-Day.