The fell that you will Stutter?

The fell that you will Stutter? Hi, first of all english is not my first language and i dont know if that questions was asked before and it feels kind of dumb but it was running through my head lately. So sometimes when im about to say something i get the "feeling" that will stutter and when i decide to say it anyway i do allways stutter. So is this a normal thing to happen or is it more like a fear that i will stutter which comes true because of the fear?