Am I wrong for being angry at my mom?

Am I wrong for being angry at my mom? My little cousin had his birthday today and out of nowhere when I was playing games, mom came to my room while holding phone and told me that I need to wish my cousin happy birthday. I instantly panicked and terribly stuttered, even my uncle started saying something. It was just so humiliating, she knows how fucking stressful things like that are for me yet she did that, plus after I told her that she shouldn't have done this she started crying and saying that I always have to make such a big deal out of everything. Now I'm feeling humiliated because I terribly stuttered, guilty for getting angry at my mom. Do you guys think I really overreacted?