I won't say much and I am not giving you any tips for CAT, I think there are enough number of them along with answers for this question. Instead I will tell you a story.
It is a story of a person similar to you, he too like you strove hard for CAT, sacrificed a lot of things, spent sleepless nights and drowsy days, his academics took a turn for the worse, but still he believed. He never had percentiles less than 99 both in both sections. His English was good and he wrote often and read a lot, he believed and reveled in his hard work. People around him praised his scores, asked for tips and predicted his fate even before it began.
Follow the link : common admission test (cat)