Working on Self Belief

I know I have had shifts and my thinking and transformations through self-coaching and coaching through Self-Coaching Scholars. My partner said, “Yeah, I see glimpses. Nothing bad.” Now I find myself upset making it mean that I haven’t had any breakthroughs. I want to cry. How quickly I go back to bashing myself that I’m not good enough, working hard enough on myself, and not having my own back. I want to believe in myself enough that I don’t get triggered by the smallest comments and go into insecure thought spins. Any advice on how to build my self-belief?