I'm kind of a unique case, in that I developed a stutter (and a tremor) last year due to an episodic, neurological condition. I have good days and bad days, with my stutter, but also with my tremor, with my fatigue, with my brain fog, with my pain etc. I think it's kind of part and parcel with the gig of being human. We all have good days and bad days which are affected by stress, sleep, diet, socialization, hormones, etc. Ours are just pretty visible.