>>12333909"Trauma" is an overused term some associate with crazy SJW types, but looking at stuff like that is absolutely a mild form of psychological trauma. That's just how the brain generally reacts to loss of loved ones, be it a death or break-up or falling out or whatever. Even for many people who may be a bit on the autistic or schizoid spectrum.
Almost everyone experiences it. Just accept it. If I were you, I'd just try to avoid looking at those things again or other things that could be associated with her. Distraction is the best way to lessen the blow of it.
I will say, though, I still get that stabbing, visceral reaction when seeing things about my first ever romantic relationship, which happened well over a decade ago. That person later happened to become quite famous (most people reading this probably know them), so I randomly see their face or mention of them when I don't expect it and have regularly for many years, which kind of makes it especially surreal.
I really don't even know why or how I still have that reaction after so long, and with several other relationships in between. It's pretty much the only thing I have any sort of reaction like that to, and I just try to avoid and compartmentalize it as much as I can. I guess that's not a hopeful message for you, OP, but I figure in your case it's probably not a first experience and they're probably not famous.