Most of my career I have been dedicated and worked seriously, but never over-worked for any extended period of time. I think I might be just a bit above average

Most of my career I have been dedicated and worked seriously, but never over-worked for any extended period of time. I think I might be just a bit above average compared to co-workers in terms of amount of work done. However sometimes I have been unable to produce almost anything for maybe 2-6 weeks. I was scared to be discovered and blamed. To my surprised it never happened. Most of the time I have been able to bullshit my way through it. Only once it clearly was discovered I did not do my job. Not even started actually. A manager asked a coworker to help me on my task, which was a bit of shaming for me, but not too bad either. I was a contractor and some time ago the company offered me a position (which i declined). So I do not think this had any consequences.