Can stuttering originate from trauma

Can stuttering originate from trauma I’m 24 years old and haven’t really struggled with stuttering in 8 years. But I stuttered a lot from 4 to 16 years old. Like a lot a lot. Some facts: - stuttering stopped when I started high school in different town - I was bullied a lot before high school - I’m just learning that my father used to hit me (I don’t remember it and if it did happen, it happened in very early childhood) - My mother has some narcissist tendencies - My four younger sisters were very often much more important and I just kind of missed out on attention So what I’m wondering is whether I’m stuttering because of the way that I am and I just got insanely good at not stuttering without professional help in the span of 6 months (after middle school and beginning of high school) or is there a psychological thing and bullying was just keeping me stuttering and when the bullying stopped I could start healing. I just started therapy for not standing up for myself and still living under my parents expectations and things just got me thinking. It makes sense that my stuttering got better when I wasn’t getting bullied anymore, but the stuttering started way before I started getting bullied, so the bullying causing stuttering isn’t as clear cut as it might seem. Oh yeah and I still stutter from time to time. It’s when I’m stressed and am under pressure about what to say.