It may seem like a good idea, but are you prepared for the consequences? Consider the likely outcome and think about what you can do to minimise the possible downsides.
When you can't stop thinking about the same problem, over and over again, and you keep thinking about the past, you are ruminating; you're engaging in an inefficient mental exercise. Let these negative thoughts pass. Instead, focus on what you can do now. Live in the moment, not in your mind.
It's okay to tell someone that you think they can bring addition value to a project or task. It shows that you believe in them and gives them an opportunity to stretch themselves and grow.