I usually hate it when people make posts like these, because there's an obvious and sensible response: "Calm down, one B isn't a big deal." I am terrified though, because I would really like to get into a top school, and I was counting on my high GPA to help me out. If it were a B+ in Post-Marxist Basket Weaving or something, I wouldn't sweat it, but this was in a high-level math class. I don't even feel like I did that badly in class. I had a 98% before the final, and I thought I did well on the final. I don't know what to do. This is the kind of thing I have nightmares about and then wake up and go "Phew, glad that wasn't real."