Is it normal to develop a stutter in your teens?

Is it normal to develop a stutter in your teens? (14m) I’ve never really stuttered before… it’s only now that I’m starting to stutter. I have really bad anxiety issues and adhd, so that might be the issue. My mind moves so fast, so my mouth can’t really keep up, and I’ll either say words wrong (ex “specificallgy” will come out as “spefifically”) and have to go back to correct myself or I’ll just stumble over my words. I feel like a lot of it comes from the anxiety of being misunderstood too, and it only makes the stutter worse. Is this normal though?