I have this same issue. I'm would almost say fear of failure. At least that's how i've thought of it. It seems to me that I would put a lot of work into something and then either fail at it later or even right away. This stays on my mind while I do things as well and try to move forward in my life. It's part of my reason for going back to school even though I just finished a degree. I try to push through it and make myself keep going because I know once I get there things won't be as bad as I thought they were going to be.