Don't let this threaten your confidence in yourself as a nurse. I have over 25 years in nursing experience and can tell you that mistakes are just going to happen. We don't want or mean to make them, but we ALL make them. Even physicians make them. Of course, we try our best to NOT make them, but we are all human. Just take the mistakes as a learning experience. An "unsafe" nurse would be one that continually makes the same mistakes and doesn't bother to learn from them and is not bothered by making mistakes.