Talk to Speech Therapist on Stammering

i am looking for best speech therapist who can understand my problem and fix it. I am facing stammering problem when I was 12 years old then I didn't pay much attention to this problem but now I am 29 years old and I have a lot of problem to communicate.Because I work in an office.Sometimes. I can speak perfectly well. But sometimes a word comes into my mind but doesn't comr out of my tongue.