Getting anxious for any situation

Yesterday a friend proposed me something i wasn’t expecting. She wants me to have a little booth at a literature convention to show my book and my coming soon books. But wasn’t sure about it.
During that very moment, while she was telling me very nice things about my book, writing and how I made her want to read books again, I was having a little anxiety attack.
Having anxiety is not the same as having a panic attack (which I have too). Here you feel fear and worry about a situation that is not happening yet. Fear is the immediate response to a potential threat, but anxiety is fear to something that could happen in the future (or that could not happen at all). Also, is an overreacting situation with muscular tension and maybe problems on sleeping and concentration.

So I was thinking I could go to that convention, but how people will like my writing. I’m nothing yet. I haven’t even finish it for sure (I’m a perfectionist) and at the end I thought shouldn’t do it. In the meantime I was telling what my friend said to another friend, who agreed with her. So I had double anxiety! My hands started to shake and sweat while I was laughing nervously. I realize I was really behind my own deadlines and I need to work as fast as I could to have this done. And also that I need a printed copy (or two) so I can show it or give it as a prize or something.
My anxiety grew all night and today I woke up I need to focus in this a lot. But also, I have to focus on my illustration path, and at the end my head exploded.

I feel completely useless and insecure. But I’ve been working on the book all afternoon.

It could be a really cool thing to do, to go to this convention. But I need to believe I can do it. Believe I’m the writer I want to be.

I hate anxiety.