This is not the kind of mood in which you find yourself singing along with Gloria Gaynor’s ” I will survive”. It is not the triumphantly stomping out of the door while yelling ‘I’ve had it, I am leaving’.
You are simply not sure whether the step you are taking will be helpful.
You do not know if you should have or could have hold on just a bit longer.
This is the mood in which you very much doubt if ‘you’ve had it’.
You fear you might just have done the stupidest thing.