stuttering issue

stuttering issue i’ve had prominent stutters twice in my life, and the first one was due to stress. i don’t have any major stressful events right now, so i’m not sure why i’ve been trying to say “blueberry bliss” (i do stutter sometimes, and i have sort of a lisp) and i’m all of a sudden stuttering on sentences. am i faking it? it feels like i am, because anything else seems impossible. it’s on and off, as in i have a pretty bad stutter, and then none. i’m not sure if it’s me, or if i’m crazy, or something else. i am also autistic.