You Are Not The Main Character
You constantly overestimate how much people notice your behavior or appearance. In reality, most people are far too preoccupied with their own lives to pay much attention to your minor blunders.
This psychological quirk happens because you are the center of your own universe, making it difficult to view yourself from an outsider's perspective. When you trip in public or wear an odd outfit, your brain screams that everyone is watching. In truth, observers rarely register these details because they are busy worrying about their own spotlight moments. Realizing this can be incredibly liberating for your social anxiety.
Source: Spotlight effect