You have to accept that the bullshit in your head is there for a reason, and that it is a part of you now. As you accept it, you can become aware of its effect more quickly and it over time loses its hold.
PTSD, anxieties, they don't go away, they just fade to the background. It is ever and always a journey and never a destination.
Talking makes it more real than keeping it in, which helps a lot, just make damn sure you trust the person. This I also know from good and bad experience.