If I'm reading the research correctly there isn't any evidence that one source of stress is different than another, stress is stress and it doesn't matter if it is because of a life and death issue or a trivial one, it has the same effects and feels the same.
I'm sorry that you've internalized your difficulty with stress and don't think your feelings are legitimate because IT work isn't "important" enough, it's not a bad reflection on you to have stress. It reminds me of something I once read about ESPNs web operations, they remind themselves that he stakes are ultimately low, "We are not doctors, if we screw up no one dies, worst case is someone doesn't get their sports scores for a little while."