I went through the same thing. I wrote a book (all the info at jwfacts.com) as that way at least I got it out and did not have to go over the same topics endlessly.
After that I still had problems so went to a cognitive behavioural therapist. That involved writing down the thought going through your mind, how it made you feel, and then writing about 8 other positive ways to think of the situation. That really helped, though I admit I still constantly have JW thoughts racing through my head 2 years later, just now I can control them and not get upset over it.