[CameronBarre]

You have to believe in yourself, beyond any personal conception of career advancement or professionalism.

Unless you work in a hellish organization, most people appreciate a person who can own a mistake and then take the required action to correct it.

It's when people are completely blind sided by the consequence of a mistake that you knew about, but kept to yourself that things start to get dicey.

In the end, everyone makes mistakes. If you work on the most critical of systems where mistakes are life and death, then I pity you, but if you fall outside of the realm, just be honest about what happened with whoever it matters to.

As others have pointed out, you can help yourself by practicing risk management. If you're taking a risk, try to hedge it.

I think most importantly, don't be scared of your job.

Good luck!