onmyway76,
I have had both types of therapists - one who specializes in trauma and one who didn't. I found the experience very different. For instance, a trauma specialist would be able to ask you questions that could help you understand why you are dissociating in therapy. He/she could also help you with grounding techniques to help you during your sessions. I don't see how this is telling the patient what to do or steering them in their healing. This is teaching you a skill and helping you learn awareness so that you can find your path to healing.
On the other hand, with the therapist that didn't specialize in trauma, she didn't know how to help me when I dissociated, she actually empathized with my abusers, she even defended my husband when I was having issues with him. I got empathy or concern for me only rarely. I felt minimized. When I asked her why she continued to do these things when I had explained that I needed empathy in my sessions, she invaded my personal space physcially. So, after a year, I stopped seeing this person because my symptoms started getting so much worse.
I guess, when you see her in a month, if your T can't explain specifically what you are doing/not doing in your sessions that seems controlling, manipulative, etc., I would question why. If you are calmly asking for clarification, and your T cannot give you that, then how is that your problem?
I agree with the advice you are getting here. Therapists can project their issues onto patients. If she isn't a trauma specialist, he/she may be out of their expertise, and rather than admit it, put the blame on you. It doesn't mean he/she is doing it intentionally, it may just be a lack of understanding his/her own issues.
I agree with Anthony that IF you are showing manipulative, controlling behavior in therapy, then your T should have brought it up sooner. Also, getting a second opinion never hurts.
The reason why I say this is that you seem to get help from your T when you were working on issues regarding your husband and child, your T was helpful. But only since you have started sharing your childhood trauma are you not feeling the support from your T. Only you can decide if his/her attitude has changed, or if your defenses are up due to how much you are struggling with your past.
Also, dissociating as far as I know, has nothing to do with being borderline. It is uniquely a symptom of PTSD. So, if your T is saying that you feeling dissociated in your sessions is being controlling and manipulative, then that doesn't sound accurate to me.
I hope this helps, and I really do wish you the best in sorting your therapy out. A good therapist is very hard to find!