[yesenadam]

Some vague advice from a non-expert:

It may well be a fact, for you and everyone else, that if you make a mistake at work and people are aware of it, it reflects negatively on you more than the good things you do reflect positively. It's human nature, to pay attention when things go wrong. And why shouldn't it? – hopefully, you do many more good things every day than bad things. This may just be a matter of facing reality. Do others similarly fear making mistakes? You could ask them about that.

What's the worst that could happen? Often it's good to imagine that, in detail, when you are just "fearing the worst" in some situation in life, without really facing it. Living with that fear every day, as you are, may itself be much worse than that supposed "worst thing". Losing that job may turn out to be the best thing that ever happened to you–who knows. Also, strong enough fear of mistakes will actually cause you to make mistakes. Find self-help books on the subject or get some psychological counselling if it's a serious problem for you. Good luck!

[fuzzfactor]

"It's the fear, they're gonna take my job away,

it's the fear, I'll be working here the rest of my days . . ."

D.Fahl

https://www.youtube.com/watch?v=kRk3dJ0fGKE