We often feel like we are only as good as our job, our children, our body, but we are in fact valuable simply because of who we are. 
Let all judgement go. 
What are your strengths? 
What do people come to you for?
Ask 5 people you trust what they value about you, and why.
Gather this evidence, in a physical place, if you want to, and reflect on it, often. 

Consider talking this through with a coach or mentor.

Every night before bed, consider three things that you're grateful for about yourself, and one thing that you're proud of.