I am reading your post asking myself "Why NOT be so upset?"Geez, hun... I would be bawling my eyes out too...no matter how much time you spent on it, you did put something into it and you wanted something back for it....

Thats kinda like doing a 8 hour shift and not getting paid but instead you are told to go back and redo it....

I'm sorry this happened to you...and once you have had a good cry over it I think you should look on the bright side and see that at least he is going to give you a few clues as to why you made an F and you will be able to make good use of your second chance.

Its okay to feel let down sweetie... just don't let it ruin your good mood for very long...

Good Luck with the next paper!