Neurogenic stuttering?

Neurogenic stuttering? Does anyone have diagnosed neurogenic stuttering? What was the cause of your neurogenic stutter? I am curious if you stutter when alone/reading and what kind of stutter you have (block/prolongation/repetition). I developed a stutter rather late in life, I think it was during early high school that I first noticed it but it got severely worse over the years and now in University it feels like I struggle to speak in most situations. I don't think its regular developmental stuttering as that usually occurs in early childhood.