Yeah, seconding this - please don't rule out developmental stutter just because it started at 7. The brain changes a lot in early childhood, and 7 is around when my stutter started. By around 9, it was almost completely gone after a year with a good speech therapist. In my case, ADHD and high IQ meant that my brain was developing more and more complex ideas and trying to spit them out _really_ fast, and my mouth just couldn't keep up. Looking back, I also think that that was the age where I became aware that my audience did not have infinite attention span. Actively paying attention to my audience, wanting to pick the way to tell the story where I hold attention (but being 7-8 and bad at it), I think activated some anxieties that didn't exist when I was littler and just spoke in an unending stream. Trust the process, Speech Pathology helped me so much.