Question... Are you reacting this strongly to this event... Or in your trauma history were you supposed to keep a terrible secret?
Even your other post... When I read exposed , that's what I feel at my worst; exposed. A big fat target. Danger Will Robinson, I'm about to get my ass handed to me at best, but at worst everyone I love will die. Catastrophic thinking goes hand in hand with my feeling exposed. I was surprised to read, from the way that you were phrasing things, that you'd exposed someone else. Not that it's a bad thing. Expose a murdered, expose corruption, exposure is one of those neutral concepts that it really depends on which side of the flashlight you're standing. Linguistically, it felt like you were the one who felt exposed, instead of the one doing the exposing.
Made me think then, and really makes me think now, that maybe you're not actually responding to this event? But perhaps one in your past? The fears now being the fear of what might could happen back then... As opposed to the reality of now.