I know the therapy process can make life worse before getting better. Three years is a long time to watch your life get progressively worse, but certainly not unheard of.
I know you didn't ask for advice or anything, BUT... How long have you been on this downward spiral? What else does your T do to help you besides talk? I think talking is most important, but there needs to be more especially when childhood trauma and PTSD is involved. Those with childhood trauma need to learn to re-wire the brain and talking alone can not accomplish that.
I just read this interesting article I thought I'd offer up for food for thought:
http://www.traumacenter.org/about/.....u09.p12-13.pdf
So if interested on learning more, google Bessel van der Kolk and PTSD or trauma and read some of his material. Most everything he tells rings true with me.
My point is, if your T is doing more than talk therapy, yes, you have the potential to not only be ok, but to actually thrive. If she isn't doing more, I would consider talking to her about doing more, especially in the Mindfulness department. If not possible, I would say for your own sake find another T. If it's hard to imagine leaving your current T, perhaps you could see a second T in addition to her.