Fearing my F-1 visa interview

Fearing my F-1 visa interview As I have a stutter, I occasionally stutter alot and it’s out of my control. Even though I am not nervous at all I stutter, and it has become a pretty common thing in my life . But, I have to face my F-1 visa interview, I wonder what should I do about this. Please help me out. Should I mention about my stuttering at the first of interview? Or should I practice talking in a large volume. I am very very scared.