Okay, well that sounds a little different. Do you fly off the handle a bit? Would you consider these events "rages"?
Also, how long has this been going on?
One more question - do you experience this more or less around the time of your monthly cycle or does it seem disconnected from it completely?
Alright, so it isn't simply a hormonal issue then. My guess is that you might be having a bit of an impulse-control issue. Impulse control disorders can manifest for a variety of reasons and usually have the symptoms of irritability, annoyance, and reactions that don't match the severity of the event in question (e.g. going off on someone even though their behavior doesn't warrant it). Impulse control disorders often begin in puberty and can be treated with anti-depressants or therapy. My guess is that a low-level dose of something like Paxil might help a lot.