We all make mistakes. Sometimes others notice, sometimes not. When you do, find a way to learn from it and laugh it off. If you do so, it will pass faster and you can move forward instead of looking backwards.
The more you let mistakes roll off of your back, other people will forget too. The point is to move forward, fix what you can, or note what you did so you can learn from it. This includes acknowledging mistakes to superiors at work or your spouse, etc.
It doesn’t mean there won’t be a tense or stressful moment. If you are honest and apologize, and maybe explain what happened or that you have learned from the mistake, the faster you will move past it.
Remember, everyone makes dumb mistakes. Everyone. You aren’t alone in this. If you figure out how to deal with mistakes in a constructive fashion they will be in your rearview mirror as you move into the future with a clear conscience and free from the weight of the mistake.