Nah, it's not you, it's everyone else. Nothing like being sliced, diced, poisoned and irradiated then blessed with shriveled bits to to clarify your exact tolerance for twits, twats and unexpected loud noises. All those years of being nice to people (OK maybe not so much on my part) and now you have turned stabby. Hardly surprising, really. At least you can console yourself you used to be patient...
Hang in there chick, and if you bite someone, I'll bet they justly deserve it.