Throwaway, clearly. I've changed the specifics for obvious reasons but I think the gist of the situation is here.

So a few months ago my GF and I were with friends at a bar/casino watching football. Long and shitty story short: guy walked in, pulled a handgun and started waving it at customers and the girl and guy behind the bar/register. Told everyone to get down, demanded money, was switching between aiming at all of us and then right back to the bartenders.

All of us were kind of crouched down on the floor in hardcore "WTF?? Is this real??" mode. I reach over to grab my GF's hand and let her know it'll all be cool and to keep her from freaking, but she's not even looking at me - she's locked on the dude waving his gun around and reaching for her purse.

I've known my GF has had her concealed carry permit for awhile (her Dad and brothers do, just kind of a thing I guess) but I wasn't aware she actually carried. I definitely didn't know she had something like RIGHT FUCKING THEN.

Things were over the top freaky at that point, the bartenders didn't know how to open the registers without a transaction and were trying to punch one in or something and dude with the gun is yelling he's going to shoot if they don't hurry up, that they're obviously fucking with him. Total chaos. GF now has her gun and has actually moved fucking closer to this nut job, I'm whispering for her to just be cool and she's whispering back she's okay. The robber turns away from the bartenders and drops his gun a little (still holding it, just not aiming right at anyone), GF fires and knocks him down.

No, she didn't kill him but he was done. Someone else grabbed his gun and then a bunch of us piled on him until the cops came.

So here's the thing: on one hand, I'm proud of her. This guy was on drugs, who knows what would have happened. She could tell the gun was cocked and ready to fire and she acted. Great, right? But I just feel disturbed and I can't shake it. For a few weeks afterward she'd take an extra run or something and just say she needed "to think some things over" but that's really it. I'm waiting for this breakdown that just hasn't come or something, and meanwhile I can't stop replaying the whole thing in my mind. I feel like the girl in this relationship all of a sudden. Not sure what to do, thanks for any insight.