As creatives we are naturally sensitive people and believing in ourselves may not always be easy for us. I know from experience that it's been difficult for me but over the years I've become better and better at it. Now I put myself out there, I get paid for my work and I'm happy to share it with others.
Cause the hard-to-swallow-pill is. You'll never come to a place where 'Confidence' finds you. You will always feel like a student and someone that is 'getting there'. There won't ever be someone that says 'you're here. you made it to the destination' cause there's always more information to gain and improvements to be made.
So know this. Wherever you're at right now, you're at your peak. Right now, you're the best you ever been. Doing your absolute best work you ever done. Absolutely killing it.