Yes, it's possible that taking a practice test two days before affected your mental stamina on the real test. (This is why we tell people to take their last CAT a week before the real thing.)
This is your mantra: right now, you know what you know and you're not going to forget it all in a few days. As far as what you don't know, you're not going to learn it all in a few days. So those last few days, you don't need to do a bunch of practice. Your scoring potential is already locked in. Doing a bunch just before the test only gives you the opportunity to lower your score via mental fatigue.
So, you have to fix the timing and decision-making issues.
decision-making:
https://www.manhattanprep.com/gmat/blog ... -the-gmat/Timing:
https://www.manhattanprep.com/gmat/blog ... -to-do-it/http://tinyurl.com/GMATTimeManagementEspecially sections 4 and 5 of that last article.
And regarding my study material, apart from the official guide, gave only one mock test of the GMAT prep and 4 manhattan CAT tests.
Here's another part of the problem. This is practice material. It is not study material. Practice and study are two different things.
Practice material allows you to practice what you have already learned. It doesn't teach you how to get better - you need study material for that. Just doing more new practice questions without actually learning how to study is not going to help you get to where you want to go.
So I am not going to give you a source for more practice material, because that's not what you need right now. You need to learn how to study first. Then, you need to go back and study your existing practice material in a way that allows you to extract all of the necessary lessons. Then, you'll finally be ready for new practice questions.
I'm going to return to what I said in my last post. Take the hour (plus) to analyze your CATs in the way that the linked article describes (look at my last post). Tell me your buckets. We'll use that to identify what study materials you need. Also, start to analyze OG problems that you've already done using the framework in this article (also linked last time):
http://tinyurl.com/2ndlevelofgmatTell me what you think about that framework after you have tried to apply it to at least 10 quant and at least 10 verbal questions.
Finally, yes, it is totally normal to have some anxiety around this kind of test - we all do.
If you ever think it's too strong, try this:
https://www.manhattanprep.com/gmat/blog ... mat-score/