Guess what, monstro? Almost everyone is waiting for the day that they’re found out. The day that someone turns on them and says “hang on, what are you doing here, you fake? You’re not really qualified to do this!”
And everyone screws up at times. Sometimes we screw up big in a way that leaves us wondering what the hell were we thinking? In a way that makes us doubt our capabilities to do anything.
The real idiots are those who never have any doubts, are oblivious to their own weaknesses and mistakes, and never own up to anything. They are the ones that are really dangers to themselves and others. They are the ones who are so dumb that they don’t even have the wit to imagine that maybe they’re not truly on top of things.
So by having this bout of despair and feeling of inadequcy you’re really only displaying that you’re normal and not a dangerous idiot. In fact, you’re probably falling into the trap many otherwise intelligent and educated people succumb to. Not only are you’re overanalysing and thinking too much, you’re also afraid to let people see that sometimes you don’t know the answer. Why? Because then they would think even less of you, wouldn’t they?
You’re human. Sometimes you’ll mess up. Sometimes you don’t know everything and will have to admit ignorance. Stop trying to hide it! Learn to accept it, embrace it, admit it, learn from it, and move on. Otherwise life’s going to be a constant uphill battle you’re never going to win.
My advice isn’t probably what you want to hear. Go into work and let everyone know that it was you that messed up the delivery. There’s no need to grovel, put yourself down or make light of it. Just state the facts, don’t offer excuses. You made a mistake. You’ll be surprised the difference it makes. It’ll not prey on your mind half as much for a start. Everyone’s going to hear who’s was to blame anyway, but by hearing it from you they’ll respect you more. You’ll be that bit more human.
And if they think you’re a bit of a klutz or forgetful for having done it, who cares? It can’t be anything worse than what you think yourself and it’s better than them thinking you an idiot who tries to hide mistakes. So sometimes you’re a klutz and forgetful. Big deal. And maybe you aren’t among the smartest at work. So what? Doesn’t make you a bad person. Learn to accept it, embrace it, admit it, learn from it, and move on.
On another point; those in this thread who are trying to make the Post Doc the bad guy aren’t helping. Monstro screwed up, is at fault and the Post Doc has every right to be pissed off. Trying to make out he’s being unreasonable is avoiding the issue.
(And the truly insightful will have already spotted that all the above advice is something I’ve had to learn the hard way about myself. )