Self sabotage?

I am wondering if I am sabotaging my current job to go and try a new job? I wonder if I am "letting" myself be fired/laid off  so that I have no choice but to try the new enterprise?  How do you stop doing this?  I think I am doing it, but I can't really stop. because the threat of getting fired doesn't compare to the excitement to get out and work on my own?

KH