In moments where you feel something's "wrong" with you, but logically there isn't, what are some helpful things you tell yourself?

I want to be more mindful about the light I cast myself in. I leave myself little room to grow and it'd be beneficial to adventure my way to better self perception.

I have self esteem issues that have me avoid testing how I'll react to different scenarios. Whatever "wrong" means, I often assume I'll react "wrongly." I constantly shut down chances for myself to experience more things in life. Like when people give ideas for things I can do, I almost always reject them because I assume I'm incapable of doing those ideas.