Maybe she is a "good start," and that's what you need right now. Trust issues seem to be a hurdle for those of us with PTSD to being adept at finding good help. One of my alters has a mission to sabotage healing by keeping the trauma hidden. She leads the others on wild goose chases all the time, drops red herrings on the path, and plays devil's advocate in heated internal debates (cliche heaven) which is half the problem with PTSD. I end up more confused when I actively deal with what is actually bothering me, from past or present. Progress is two steps forward, two steps back, like a strange dance. No, this is not wanting to remain "stuck" but it's a pattern of IRONY. Ironically, I struggle to get well, thrashing around in my barbed wire, I get more tangeled and cut up. But if I remain here alone, I won't ever make it out of the fence. Luckily, my husband is clipping away at wires with wire cutters every chance he gets to finally see one, and this frees me to move a bit more freely and I start to see a way out. As with you, Angel, having a supportive spouse is the first step in learning "Trust." The lesson has many steps, more than the usual 12, I'd say.
Just by going to this lady, you are asking if you can put your trust in someone to bring out the really traumatic stuff. But you're also asking yourself if you can trust yourself to protect that traumatized girl from further harm and the adult taking care of her to move on if that's in her best interest. So don't focus on good/bad splitting with the therapist. Instead, ask yourself, "Is this good for me right now?" and if the answer is yes, then go again. If the answer is "I don't see a benefit," then don't be nervous, be bold, and search again and try, try, try again, until you get it right. You were very brave to try this one. I waited until I got a referral from someone I trusted, and like you, I am not fully beeming about Therapy, but I've made some strong steps, so it must be working. Mine is dedicated, takes some notes, talks about 30% or more of the time, and is willing to be available by phone every day of the week for free! So I am pretty happy with her.