Bluffsyndromet - Myt eller sanning

I like to be high performance. I like to create new things, work hard and see the results. The journey on the road can, however, be quite rough. It looks like, my brain ghosts want to take over. My conscious doesn't always want to give me cred for the results. I usually get thoughts that now I was lucky or soon my colleague will discover the bluff. What I have accomplished is not my merit. What if it's true?