Near fatal heart attack

Last Monday I took my final for my online organ class. I thought it went pretty well and was excited about completing the class. I checked my grade on Saturday and saw that I got an 18. Yes, that's an E. So, once my heart started beating again and my eyes decided they weren't going to let the tears fall, I emailed my professor. I can't pass the class unless I pass the final, but if I was that far off then how would I even begin to prepare for a retake? Anyway, my professor emailed me back today and apologized for the heart attack. The grading center graded it with the wrong version of the test. I actually got a B+ and ended up with an A- in the class. Yahoo! I did it!