Short answer: self-trust returns through small kept promises, honest evidence, and repair. You do not rebuild it by demanding perfect decisions. You rebuild it by proving, repeatedly, that you will not abandon yourself when a decision gets hard.
Start with repair, not shame
If you ignored your own needs for a long time, shame may try to become your coach. It is a terrible coach. Shame says, "How could you?" Repair asks, "What happened, what did it cost, and what will I do differently next time?"
Self-trust grows faster when you study the pattern without turning yourself into the villain.
Keep one small promise
Pick a promise so small it almost feels unimpressive: go to bed by a certain time, answer one email, spend ten minutes outside, write the budget number down, pause before saying yes. Then keep it. Not because the task is magical, but because follow-through teaches your nervous system that your word has weight.
Build an evidence list
When confidence is low, your mind may only remember the choices you regret. Create a list called "evidence that I can trust myself." Add every small signal: times you told the truth, left sooner, asked for help, rested, noticed a red flag, or chose peace before performance.
Make decisions with aftercare
Self-trust does not mean every choice feels peaceful. It means you know how to support yourself after choosing. Before a hard decision, ask: what will I need the day after? Who can remind me what I chose and why? What practical support would make follow-through easier?
Reading path: if this theme resonates, start with Built, Not Fixed on the books page.