I saw something wrong at work and I am scared to speak up. What do I do?

The fear you feel is real and reasonable. Speaking up about something wrong can cost you, and pretending otherwise would insult you. So start by being honest with yourself about the stakes. This is not a small thing, and treating it as small will not help you decide well. But sit for a moment with the other cost too, the quieter one. The weight of knowing something is wrong and saying nothing does not fade. It settles in and follows you. You are already carrying it now. The question is not really whether to feel discomfort, but which discomfort you can live with. You do not have to leap tonight. Take one careful step: write down exactly what you saw, privately, while it is clear. Then find one trusted person, inside or outside the situation, and ask what your real options are before you act. Courage is not the absence of fear. It is moving forward in spite of it, one steady step at a time.