You know more and more I believe it has something to do with electrolytes. Every time it seems someone is dehydrated or something, their stuttering gets worse. My own body doesn’t seem to retain electrolytes well, so I’m almost always in the state of dehydration. Give your son a lot of water, maybe add some electrolytes and see if he gets better. The fact that you stutter and still have a happy family life, congrats. We should celebrate all the little wins we get.