Hi Aditya,
I'm sure you have been practicing a lot of questions and taking many tests. Yet, your performance is not consistent. What does this tell you?
That more practice is not the answer to your problem.

The first thing you need to do is to go over the questions you have already solved - analyze each one, whether you got them right or wrong. If you got a qn wrong, identify what concepts it tests and what you missed. If you had to choose between B and D, picked B, but the answer was D, then identify the delta between B and D - what was wrong in option B that you missed? What did you assume was wrong in the right ans choice D?
Similarly, even if you got a question right, make sure that you know why you got it right. It could very well have been a lucky guess; or you would have eliminated other answer choices for some basic errors (like SVA), whereas there are other things wrong with the same answer choice. It is good to learn this so that you can apply this in other questions.
The idea is to have some takeaway from each and every question you solve.
Once you do this analysis for a large number of questions, you will start recognizing patterns in your errors. For e.g. in SC, when modifiers are tested in fully underlined questions, I get confused. At this narrow level of analysis, you can easily figure out the next step. Make notes or cues for yourself that will help you later.
We have created this article on 5 ways in which you can make your prep more effective; you may find it useful:
https://www.crackverbal.com/effective-gmat-prep/Gowri N Kishore
Verbal Specialist
CrackVerba