I’ve had a stutter for as long as I remember. My parents never did anything about it. TBH I feel like now that I’m 23 it’s only gotten worse. Something I wish my parents would have done is given me a placebo. Like a fake little pill that would “help get the words out.” Even now im convinced it’s all in my head. Maybe the placebo would have helped since it’s all I my head anyways. You could try that, but I’m not an expert.