Hi Emma,
Just a suggestion, but have you thought of finding a new therapist... one with a background and specialty in PTSD, anxiety... for me, mine specializes in violence as well. There are all kinds of therapists out there and you have to have a repoire. You can chat with them over the telephone, find out which approaches they take. You can learn about the different approaches and post here if you have any questions.
I think the reason people were asking about your PTSD was to find out the nature of its cause, perhaps. When you stated you had PTSD, it is unclear what kind of trauma(s) you experienced. While other's may have not experienced the same trauma as you (an some who indeed have), there will be points that resonate with people and they can help support you better.
I like my own therapist much better than the one that I see with a fammily member. However, I could have never communicated to this family member what PTSD was and why I reacted the way I did without the therapist. Usually you have separate therapists for group and single therapy. It is just a thought, I feel for you and am rooting for you to pull through! It is wonderful to have spiritual support it's just that a therapist can help you tackle the actual diagnosis of PTSD and help you live a better quality life. It took a while for me to catch on to that.
PTSD also can be a really isolating condition, and I believe that perhaps the other member was encouraging you to participate on the forum, it helps!! You have to like your therapists and see/feel the results... Take good care.xx.