I know you weren't out to offend - neither was I - I just felt something was missing from your post / experience. It's not uncommon to have people arrive here, lost, and struggling with mental health issues, feeling they might have PTSD, but probably don't (because when asked, they really do not think they experienced any trauma event). I don't think it's wrong to point it out to them for the sole purpose of them finding a forum or ore support where they would be among like minded people who have similar experiences to their own.
I also don't think it's surprising, when asked, you have now said 'yes - here is something traumatic in my past' - that helps us ALL understand better where you're at and where you are coming from. It also means you are more likely to find the support you are looking for, being in the right place
(If that makes sense?).
I think it's merely an issue of miscommunication - leaving out the truly relevant red flag, you didn't mention in your post, but have now clarified that yes - there is trauma in your background. Some of us (myself included) do feel genuinely upset (but not offended) in the instances where people do come on here and post about their PTSD yet they have no trauma qualifying such a diagnosis. It's really no uncommon to have members truly truly glee ice they have PTSD cos their husband cheated on them or their mother died from cancer. Those Re truly awful, very painful things to experience, but they do not cause PTSD.
It's great you are seeing your T - you may also need to see a Dr (psychiatrist) for a review - and possibly a diagnosis if it would be helpful for you (in terms of knowing what you are dealing with).
The other things is a it's also very common to have experienced a trauma years ago, feel "ok" about it (in that it doesn't SEEM to affect your everyday life) but then something else something that seems so minor in comparison, fully triggers a huge, very overdue, PTSD reaction. At first, it might seem the 'breakdown' or current issues Re in no way related to the original trauma - but it almost always certainly is, and in the process of therapy, and processing what is happening for you, you slowly begin to make connections between the 'minor' incident from today / currently in your life and the huge silent bombshell of trauma that has just been laying dormant for years.