Hello Rajeevi,

In the last week, the main thing is that you have to build your concentration level, then only you can stay focused on your goal. I would like to say that please limit the study time between 10 to 12 hours and please increase your concentration and speed of reading, understanding and solving the problems then you will not face any kind of difficulty.
For preparation of exam, the most important thing is your confidence after that you should know the whole syllabus and make your plan properly for learning new chapters (but in the last stage, you should only focused on the revision of the chapters which have more weightge), solving the numericals and revision. All three things should be the part of your preparation strategy in daily routine.

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All the best.