I don't mean this dismissively, but it's kind of impossible for people to do anything about this if they don't know what terms you have in mind, or who is using them. If you don't feel safe bringing it up in detail publicly, you could consider reaching out to the admins in some way and see what they might be willing to put together for additional community guidelines if it's a consistent problem. We can't mind-read in order to act differently, so I'm not sure what we would do with this information, apart from trying to guess at what terms are triggering you and have you confirm/deny (which could be triggering), or offer sympathy and leave it at that (which is something, but doesn't solve your problem).

Personally, I have very little idea of how/when to accommodate on such a thing. There doesn't seem to be consistent convention on it and other than maybe one term that comes to mind at the moment, it is very non-obvious to me what terms are going to be a trigger. I'm also unclear on how it works for people who do get triggered in this way, if it's "the general topic being discussed" or if it is very specific words. And if it is words themselves, can they vary from person to person who has trauma even within the same kind of trauma? In other words, I am wondering, what are the specific challenges of accommodating it. Is it as simple as a list of words that are easy to avoid, is it more about warnings on subject matter, like how does that work.

Not trying to put this all on you to explain. Just saying that I don't really know what to do with the information.

P.S. You aren't "stupid and weak". A physiological reaction is just that - it's something that happens before you can consciously decide whether it should. There are therapeutic approaches to trying to help with it, but the reaction itself is not your fault. It's not like you're deciding to have a trauma response. Therapy also isn't a magic fix. But if you have any options there, it may help with coping, so that you feel more empowered in the face of this instead of fearing it as much. This does not preclude people trying to accommodate better. Both could make a difference together.