Family drama over my speech impediment M18

Family drama over my speech impediment M18 Last night, I went out to eat for my sisters birthday with my other sister and her children. Eating at restaraunts has always been a big source of anxiety and worry over my stutter, as I find it humiliating to try and tell the waiter my order over the loud groups of people and music in a typical restaurant, so I usually ask someone else to order for me. I told my sister I would appreciate it if she would order for me, and my other sister made a comment like, "What are you, four years old?" I have made it very clear to my entire family that this is a very sensitive and personal issue, and that I require support. It immediately saddened me that my own family could be so insensitive and non-understanding of it. We sat down, and I remained completely quiet, trying to hold back my tears, until one of them questioned my silence, so I spilled out my heart at the table and said that I was deeply hurt by her comment. My grievance was immediately met with hostility and aggression, and she said that I should "Just get over it" and that she doesn't want "negative energy" around her children. So I just ended up leaving the restaurant shamefully, as I felt that I ruined my sisters dinner. I ended up finding a dark place outside and cried. Am I in the wrong here?