My mom gets mad for my stutter

My mom gets mad for my stutter My mom says I'm stuttering on purpose. I haven't stuttered in years, and the last time I did was nearly seven years ago. I'm 15, and she says you can't develop stutters at 15. However, I've always had communication problems (I even have a communication disorder). It makes me not want to talk to her. What can I do? Update: tried everything (except the professional and the mama bear-ing), but she just says I can control it and that I just need to work harder at it. Now I'm just bummed.