Imposter Syndrome is normal. It's common among freelancers.
But that does not mean that you should suffer from it!
Do you feel like a fraud?
Do you stop trying because you don’t want to fail?
Do you attribute your success to luck or timing, rather than your own skills and talents?
Do you hate making mistakes, being less than fully prepared, or not doing things perfectly?
Sounds like Imposter Syndrome. The good news is that there are things you can do to beat it!