All of my grades on my previous midterms in college chemistry course have been over 100%, but I just received my final, and it says that I got a B- on the final. The problem is that I sit next to a person that has the same exact name as me. I feel that our grades were switched. But the question is should I ask this other person about what they received so that I can figure out whether or not our grades were switched (I know for a fact that he stays up all night every day, so he doesn't seem to do much work anyway), or should I just talk to the professor. I know that the TA who graded my exam is already on vacation.