Fear of being in public spaces without people I know

Fear of being in public spaces without people I know So, I’m going to the NSA conference in Chicago this year for the first time. But I’m going alone and flying alone. I already have crippling anxiety with flying but I’ve never flown by myself. I normally become less fluent when in these situations, any suggestions on how to calm down? (I’ve tried breathing techniques and such but it’s still difficult because I feel like people will judge me right away)