Ah, if something happens to disrupt the testing experience, you do have to file a complaint pretty quickly. How long has it been? If it has been more than a few weeks, maybe up to a month, it's a lot less likely that you'll be able to get any kind of remedy from the testing center. But you can always try and say that you weren't aware before that you could apply for a review.
You report having distracting or intrusive thoughts during the real test. It is of course normal to feel more nervous on the real test, but if you are noticing that you spend a lot of time thinking about how the test is going rather than just focusing on answering the question on the screen right now, that can certainly impact your ability to perform. That could be enough to drop you 20 to 50 points on the real test.
On the 2nd test, do you think that the delay on quant after losing Internet might have caused you to think too much about the test and make you even more nervous once you were able to start working again? You said that you felt good for the first part but that you struggled after you came back from the "break."
This article talks about Mindfulness practices—a way to help you manage intrusive thoughts and keep your mind focused on the test.
https://www.manhattanprep.com/gmat/blog ... mat-score/The article links to a UCLA website that has some free and paid resources around mindfulness training. There's also this program:
http://www.10percenthappier.com/mindful ... he-basics/It has a free 1-week trial and is then paid, but I've had several students who have really liked it, so that's another option.
It's also the case that most people don't cut themselves off as much as they should on certain questions on the test. People will keep pushing on questions that are really draining their mental energy—it's important to recognize that you need to decide to bail on certain things not just to make sure that you have enough time for other questions in this same section but also to make sure that you still have enough mental energy for the later sections. So this might be something that you need to work on as well, especially if you decide to do Q first again.
(But, just a note: I think I'd recommend that you stick with V first. When you did Q second, you still scored a 48! And you jumped 4 points when you did V first.)
For the ESR, you'll have to decide whether you think it's worth $30 to you. The data sometimes helps someone to understand what they need to do to get better, but it's not always helpful. If you think that most of the problem might be the distracted thinking, then I would try the mindfulness training. But if you think that there might be something else happening too, and you aren't sure what it is, then it's possible that the ESR will help us to figure out what else is going on. (But there is still a risk that even that data won't tell us much. So it is possible that you could spend the $30 but it turns out that the data isn't really helpful in your case.)
Finally, you mention having a lot of PDFs to study from. Most reputable companies don't sell their problems via PDF, nor do the official test makers, so my guess is that you're using questions that someone has put together from various sources and then they're just getting shared on forums and that kind of thing. The quality of these sources is very up and down. I once came across a forum thread in which people were debating a particular SC question from one of these PDFs. The person who posted it said the official answer was (B) and so everyone was trying to explain why (B) was right and why the other four answers were wrong. It turned out that the problem had been transcribed incorrectly into the PDF in two ways. First, the correct answer was actually not (B)—it was something else. Second, and even worse, the answer that was supposed to be the correct one had been pasted incorrectly into the document—so actually all 5 answers were incorrect. So I would just be really careful about using that kind of material. After we saw a few things like that happening, we actually banned all of those kinds of sources from our own forums. (We also saw that lots of the problems in these kinds of sources were just lower-quality in general.)
The best source for practice problems is the official material. There are the Official Guide books. The most recent edition is 2019. Our Navigator program only has solutions through 2018, though, so if you have access to Navigator, I would get the 2018 edition of the Official Guide.
They also do have online resources—they have a 400-problem Question Bank that they sell on their website (about 200 each of Q and V).
They also have a product called GMAT Focus (quant only), which I think is their best product. It's a question bank of 24 questions that is adaptive, just like the real test—so it pushes you like the real test. Unlike GMATPrep, the questions can get very hard and they are in my opinion the highest quality of all of the published official questions. You pay per use, so you pay to do one set of 24 questions. In that sense, it's expensive (on a per-question basis), but these are the best official quant questions out there. If you decide that you want to try to push Q to 50+, I would look into this product. (I wish they had it for V too but they don't.)
Finally, you referenced getting stuck between two options on verbal. Yes, this is when you narrow it down to the right one and the most tempting wrong one. These are the hardest ones to answer!
You can learn to get better in those situations by analyzing verbal problems in this way:
(1) Why was the wrong answer so tempting? Why did it look like it might be right? (be as explicit as possible; also, now you know this is not a good reason to pick an answer)
(2) Why was it actually wrong? What specific words indicate that it is wrong and how did I overlook those clues the first time?
(3) Why did the right answer seem wrong? What made it so tempting to cross off the right answer? Why were those things actually okay; what was my error in thinking that they were wrong? (also, now you know that this is not a good reason to eliminate an answer)
(4) Why was it actually right?