Anxiety and stress. Fear of failure. The treacherous little voice in the back of my head telling me that there is no WAY I'm going to be able to do all the things I need to do in the time I have to do it in, and honestly I should just probably give up entirely on this whole "freelance artist" business because I'm going to fail and die lonely and alone and aaaaargh.
I try to count sheep, but find myself counting very fast to outrun my own anxieties. It doesn't really work. :T