Self-Doubt
Trusting yourself again is a skill, not a switch.
Self-trust is the quiet expectation that your own judgment is generally reliable. When that's been eroded, usually gradually, decisions start to require outside confirmation, and even small choices can feel unexpectedly heavy.
This often happens through repeated experiences of being told, directly or indirectly, that your read on a situation was wrong, too sensitive, or not to be trusted. Over time, checking in with yourself gets replaced by checking in with everyone else.
Self-trust tends to rebuild through small, low-stakes decisions made and followed through on, not through one large leap. Therapy can help by creating a space to actually notice your own reactions and judgments before immediately second-guessing them, which is often the first skill that needs rebuilding.