Yeah its so confusing.. i m not sure is this the case with everyonr but in my case, my stutter is on my nerve base. One example of it was during some exams on college. One day i was so anxious and felt so bad (my grandma was really ill then) and i ve stuttered sooo much. Then some other exam i was really happy and literally no stutter at all.. also i tend to lose my stutter the more i talk? For example during those exams when i start to speak i do stutter but with more and more sentences coming from my mouth it somehow dissapears?