I didn't do well on the exam of Anthropology 101

I finished the mid-term exam of Anthropology 101 this afternoon. I didn’t do well on it. I failed to answer two short answer questions and was not sure about a few multiple choice questions. I guess I can get around 75 points. I am so disappointed by what I have done on the exam. I know I have to forget it, but just learn some experience from it and do better on the final exam. Nobody can always have a good fortune. When I talked my problem with my co-workers while I was working, they using these words comforted me as well. However, I still feel so bad. I think maybe I need taking a few minutes thinking nothing, and then I can get over.