Is it really stuttering?

Is it really stuttering? Recently I had this thought - I am really stuttering? I have been to some speech therapists and psychologists and I must say that the latter helped me the most. Plus I have always thought that my problem is somewhere in my head/mind than in my speech aparat. I know that there are some diseases like Asperger's Syndrome where speech disorder is somewhat part of it. So I thought that maybe I am not really stuttering and in fact it is speech disorder in some disease. Have you ever thought about this? Maybe you have some articles comparing stuttering and speech disorders in diseases?