Should I stay or leave the marriage?

I've been married since Jan 09 after only meeting my wife 2 months before we were married. She has anxiety mostly about our relationship, for no reason. She has a short temper and can get angry and at times can go into an unexpected rage and a couple of times threw things. Earlier this year my wife went from "talking" about a problem we had into a sudden rage. She beat me over the head with both fits and kicked me seven times in the chest as I was on the ground. Before the police came, she cut both her arms and blamed me to keep herself from going to jail. The police were not too sure about her story and didn't arrest anybody. She has since been charged by the prosecutor and I've been subpoenaed to testify again her. She has apologized, but her family was left to believe that I cut her and out of fear that they will be subpoenaed, she has not told them the truth. Should I stay in this relationship?

Update: November 19, 2009.
Thank you all for responding as I've had to handle this "event" mostly on my own since this is not something you can easily share with people. But I needed some thoughts and opinions from people that don't know either of us and just tell it like it is and you all have done that. We went fast to the alter because I felt and she did too that this was "it". I knew better, but let my heart lead the way without the brain... Thanks again.