Is it normal if i imagine being exposed but in reality i get really paranoid

I have this thing where I imagine myself as this show stopper and I cant wait for it to happen. When it happens or not even close but just a bit, I get nervous like omg what are they gonna think? how do I look like? Specifically, in like social networks, its the chance for you to show who you are before meeting in person or just represent yourself (Personally, i dont think it is the place that represents you, that happens only in person). However, like i said before i still imagine myself as this show stopper on facebook or something and my pictures are gasp. Yet, when it slightly happens like i.e. i put up a picture thats sexy of some sort, I get paranoid like omg the whole world is going to see this, but I wanted this to happen? but i dont like exposing myself? is this normal? I guess I should just be a dreamer since im scared of reality.