Don’t you just hate it!

I have spent all day preparing for a midterm this coming Saturday. I completed the study guides for six lessons and I the virtual practicum or teaching English language learners. I was feeling good about myself when I went to retrieve lessons five and six so my ever-helpful husband could proof read them before I turned them in. I retrieved lesson five no problem and then I went o retrieve lesson six. However, when I looked at it the answers were gone just the questions remained. I know I finished the lesson and I know I saved it but it is gone. I tried searching for it on the computer in all possible location but it is just gone. I then tried threatening the computer but it sat there its little blue light blinking at me smugly and I am sure mocking me. Which means that tomorrow morning I rise, shine, and redo lesson six? Oh well its not like it hasn't happened before and I know it will not kill me to redo it but I hate redoing something I know I have done but cant find .I think the computer ate it, stupid computer