Hi, you're not alone. I went through the same thing in my late twenties. It was so gradual that I can't pinpoint a specific trigger. I had an MRI that came back normal. My family says I never stuttered before, but I recently found old videos where I clearly have a slight stutter. I also have vague memories of situational stuttering during stressful moments or when speaking in public. There's a history of childhood stuttering in my close family, and in my case, I also had selective mutism throughout my childhood.