Thank you for the additional information. I'm sorry to hear that your PTSD symptoms are worsening. Given the time and energy you have spent to treat it, it must feel frustrating that you do not feel better.
When symptoms do not improve there are variety of variables that contribute to the reasons. If you feel the medication is not working, its important to assert these feeling to the psychiatrist and explore changing medicine, dosage, and/or the combination of the medications. Sometimes its helpful to have a physical exam too to rule out biological factors that may be interfering.
You already know that being in therapy involves a real commitment to experiencing uncomfortable feelings and doing the work required by you between sessions. I am no suggesting that you have neglected this responsibility. I'm suggesting that you explore if there is anything recently or in the past that has resulting in blocking your progress. Discuss your concerns with your therapist and ask for feedback. Ask if, in their opinion, you are actively participating in your treatment or has something changed?
Lastly, Eye Movement Desensitization & Reprocessing (EMDR) is a therapy that's used for people with PTSD. As with any therapy there are mixed results of its effectiveness. For some people its been very helpful while for other's it did not provide much relief of their symptoms. There are several website that discuss the technique and its therapy. You will need a specialized trained EMDR therapist for this type of treatment.
Here are a few links:
Again, I know it feels discouraging that your symptoms persist. However, there is hope that you can relieve these symptoms. It will take perseverence that includes exploring all of the options until you find the ones that works for you. That is what you did by asking this question. Keep asking and keep requesting support from your treatment providers. I wish you the best.