The thing is, in the hypothetical situation, you killed a person. First off, you're a woman and you're sensitive, your conscience would eat you for murdering a human being. Second, good luck getting a job with "murder in self-defense" on your record. Third, good luck finding a husband who's not scared of your psychotic ass.
Point is, stop being stupid and realize you're not going to kill anyone and you're overreacting.
Aside from all that, good luck escaping prison time. Self-defense is not that easy to prove.