Do you have access to a speech therapist or a regular therapist? I’m a bit older than you and if there’s one thing I’ve learned about stuttering it’s that the mental aspect of me worrying about some future speaking event and what people are going to think is a huge drain on my mental health. It’s the constant anxiety that really affects me, the actual event much less so. You can still take steps to alleviate your stutter but retraining how you think about it should a priority. You can’t let it control your life. At 27 I still struggle with this but I’m trying. One of the most inspiring people I met was someone with a pretty severe stutter who taught economics classes at a college. My therapist brought him to talk to me. He was gregarious, happy, extroverted - all traits I thought were unattainable for me. Up until then I always thought stutterers tried to hide themselves as much as possible because to have a stutter meant shame was like a intrinsic part of your being. To meet someone with a stutter much worse than mine who was teaching and doing the career he wanted showed me that stuttering didn’t have to dictate my life.