I only feel anxiety when I think about creating a social media accounts, therefore I've never had any kind of social media account. In real life I almost never have anxiety, in fact I thoroughly enjoy  public speaking and going out with friends. But whenever I try to create an Instagram  account I feel tense (a sort of tightness in my chest), I start sweating and I just generally feel horrible. All because I'm worried about what people will think of my posts. 

I want to use social media to keep in touch with acquaintances and old friends, it feels like I'm missing out on that.  

Anybody else feel this way? Literally never felt this way before and I'm confused.