Stutterers who started stuttering later in life?

Stutterers who started stuttering later in life? People who started stuttering later in life. I'm curious to know when/how it all began? It started for me when I was 13 right after I changed schools. I remember being a fluent speaker before that. I remember being able to tell jokes, ask for food, call up anyone on the phone..etc. but now I cringe even at the thought of these activities. So..anyone else?