Definitely review your exams! My Torts professor entirely skipped one of my answers. On every question he had marked a point value with a red pen, but on one page he made no marks at all. I explained this to our Dean of Academic Affairs and she had the professor review my exam. (At my school, we're not supposed to contact our professors if we have a question about grading, so I went straight to the dean.) A few days later, I checked my grades again -- and my grade had gone up two steps. Thank goodness I looked at my exam, because my grade had been just at a spot on the curve where a few additional points made a world of difference!