the right questions?

I got my grades today, and for the 2nd semester in a row I was a little underwhelmed, despite the expectations I had concerning my grades, going into finals at least.   I do well enough in school, and I'm in no danger of being in study hall or academic probation or anything like that, but still, it's a little disturbing to get some grades back that are significantly different than you expect.  I sent a couple of questions to my economics teacher because that is the only grade that really concerned/confused me.  It was also the only course that I took which really had a holistic and objective scoring policy, because it was all done with testing rather than papers and studies.  I don't have a very optimistic outlook on getting the grade changed, and maybe I did much poorer on the final than I thought I did?  If that's the case, then okay, but it bothers me if this is not the case because situations like this are exactly the reason I chose to be an Economics major, aside from my interest in the subject.  Oftentimes I don't see the validity in having my thoughts and opinions determined by a professor, who has a preconceived notion of intelligence a lot of the time, as intelligent/correct or not.  

In some ways, this might reflect a certain amount of insecurity on my part because maybe I'm just scared that my own opinions about my "cognitive abilities" are inflated.  It's certainly a possibility, but I'm not quite sure that's the case because I'm willing to participate in discussions with professors and friends in most sorts of subjects, and I try not to speak unless I have some inkling of knowledge about the subject being discussed.  In the end it doesn't matter because the difference between an A- and an A isn't that different I guess, but I am very interested in hearing the explanation for this grade.  I try not to usually complain about the grades that I get because I know I am far from the most diligent worker, but this would be the second time in a semester that there's been some discrepancy between the grade on the paper and the grade that my answers (according to the textbook and my notes) reflected. Oh well, dudes. We'll see.
IN THE MEANTIME, A SURPRISINGLY LEGITIMATE (AND ALSO RIDICULOUS) RAP VIDEO: