My mood got better but my stutter got worse? Why?

My mood got better but my stutter got worse? Why? So stuttering is neurological but it's also influenced by mental health. I moved to another class where I have a lot of friends and I don't feel left out by my friend so now I'm so much happier at school. But I feel I stutter more often which is weird because it's supposed to be the opposite. Can anyone else relate?