Being in a small group setting where each person is encouraged to share their thoughts or opinions. That sets me off big time. I am really fearful of adding my "two cents" to anything. This was terrible when I was working, as we'd often have team meetings to discuss projects. My brain would jumble up and I wouldn't know what to say.
My husband's work events, where he knows everyone (co-workers) and I don't. I guess I'd be expected to hang out/converse with the other "partners of employees" but that's even worse tbh. In fact, any event where there will be lots of people and I am expected to interact is a trigger for me. Things like church are fine because I can just sit at the back and listen, then leave early before I have to talk to anyone, lol.
Sometimes I get in this mindset where I don't want anyone to look at me. So I avoid avoid avoid. I stay at home and avoid things like family gatherings and church etc.
Being in unfamiliar places with unfamiliar people. For example, starting a new job. I HATE starting a new job. I know everyone struggles with that but I get so anxious I find it really hard to ask people for help with what I'm learning to do.