Struggling to Explain My Trauma to Therapists

I don't know how to explain to therapists and the like in a way that they'll understand that, usually, I'm not really thinking about specific events. and very rarely ever just one specific event. it's just this vague discomfort and dysphoria about the past. I don't KNOW what I'm thinking about, because there's too much to pick out from that I've forgotten when one event ended and the next started. they're blended together and I can't untangle them. it's just a big, messy glop of goo. it's this persistent gut feeling that something bad has happened, but not knowing what had actually happened. until I get triggered, that is. then it all comes back for a bit. and I find myself wondering how I could ever forget something like that. then, as if nothing happened, I forget again. [not really looking for advice, just wanted to get this off my chest]