Hello Dear,

Don't worry about the past. Prepare well for  mains april. Now you know the topics in which you are weak. Get a grip on them and practice more. Spend extra time on those topics. Try getting more percentile such that you will get a NIT or IIIT ,selected to advanced.

If you want to know your level ,

100 - your total percentile score is the percentage  of people ahead of you. 869010 are the number of candidates appeared for Jan exam. So rank formula is (100 - your total score) X 869010 /100. If the number of candidates for April exam increased to 1200000 then your final rank shall be (100 - your total score) X 1200000/100. Calculate your rank and start preparing from now.

GOOD LUCK