Crap!

So today I had a big cell biology test. I felt pretty good because I knew the answers to the short answer and essay questions. There were two questions where we had to diagram out certain processes and explain what was happening. Each response took up a full page. I had just finished diagramming and writing out the first of these questions when I realized that I had just diagrammed the wrong pathway. I knew how to diagram the correct pathway, but by he time I realized my error it was too late and I didn't have time to fix it. I wrote a note to my prof letting her know that I realized my mistake and scrambled to write as much of the correct pathway as possible on the back of the test. The question was worth a lot of points...needless to say I felt pretty shitty after taking the test. I was hopping for all As this semester... I don't think that's gonna happen now.