What helps when doubt starts creeping in?

Try separating the feeling from the evidence. Write down what you’re worried about, what you actually know, and one small next step. You don’t have to talk yourself into certainty. Just make the next decision using what you can check.

I’d also ask what the doubt is pointing to. Sometimes it’s a vague loop that doesn’t need more attention, and sometimes it’s a useful reminder to pause, get advice, or adjust your plan. You can hear it out without letting it make the whole decision for you.