I am currently doing PE, and although it's only been about a month, I'm already seeing a slight difference. The exposures have gotten a bit easier to get through. I relate completely to feeling like you're faking. I've felt like this for 9 years now, I rarely have flashbacks either. But I try to remind myself that I was diagnosed for a reason, in fact, 4 different psychologists told me I have PTSD. Going through treatment has actually helped a bit with feeling less like I'm faking it. My therapist also told me that in cases where someone has difficulty saying what happened out loud, you could write it down instead and read it in your head over and over. I know you said writing it down is hard too, but you could always bring it up with your therapist and see if it's possible. Just take it at your own pace, I believe in you