I only felt that way after REG. I was so shocked by the questions I got that I knew for sure I had failed. I got in my car, texted everyone I knew would be checking in with me and said “don't want to talk about it,” then a month later, learned I got an 87. Go figure. Later, I read somewhere on this forum that if you feel like you are getting impossible questions, it's because you're doing really well. You could get most or even all of those really hard questions wrong and it may not hurt you as much as you think because, relative to everyone else, you did very well on the not-so-impossible questions. We have no idea how these are really being scored, so it's just hard to know which way to go in your mind when you leave the testing center.
My first exam was FAR, and I think I was so prepared for it to be horrible that I was pleasantly surprised by how un-horribly it went. I was tired, but I went about the rest of my day as usual. I didn't “know” whether or not I had failed, but I did not feel like it was a Greek tragedy or anything.
AUD, I was not as well prepared for, and my standard issue comment to people who asked how it went was “It was tough, but I don't think I failed.” Turns out, that was pretty accurate. I guess by the third exam, I was used to the routine and didn't sweat it that much when I left Prometric. It also helped that I took AUD at the end of the testing window, so I knew I'd only be waiting about 10 days for my score.
BEC was a very different animal for me. I felt so much pressure going into it (for personal reasons, I really, really need to pass it on the first try, which wasn't the case with my other exams) that I wore myself out studying and nearly had a nervous breakdown in my final days before I took it. But I felt like I got a mostly “fair” exam. There were some questions that were unlike any I had seen in Becker or Ninja MCQ, but overall, I did not walk away feeling like I failed. It bothered me that I only managed a 78 on AUD, but at this point, I honestly would not care at all if I get a 75 on BEC. I just need this whole thing to be over ASAP, and I may lose my mind if I get a failing score on May 5 and have to wait until July before I can take it again.