80% of my 1:1 coaching clients are women over 40. Many of them have similar traits; smart, successful and yet they struggle with imposter syndrome - that feeling that despite what they have achieved, they're not good enough.
This can occur due to a toxic work environment or a terrible boss. Sometimes divorce occurs or the kids have left home and your world is turned upside down.
Life throws things at us that knock us off balance.
There are ways to overcome this. The speed at which you do this involves variable factors. Are you an introvert or extrovert? and How much do you procrastinate?