My sons stutter started at 4, got Speech therapy and it was great and we stopped after a few years. Came back in 6th. I think hormones stress of school or newness brought it back, we got speech again IEP and it went away now in 9th. He’s 15 and we are “ graduating” out of speech. Have you been under stress with school? Possibly new changes? I would advocate for speech. Mys sons is a more mild stutter but speech’s been an amazing help to give him the tools to use should he encounter dysfluencies.