Let me offer a different perspective on this issue. Have you ever thought that your speech problems are partly caused by your perfectionistic tendencies? Have you actually really listed carefully to other people converse? There are plently of repetitions, hesitations etc. I believe that the fundamental difference between a PWS and a person who does not is the reactions to disfluency. I am not fully familiar with your case, but realising that no one actually speaks perfectly and not overreacting to minor speech inconveniences has helped me a lot.