mistakes

The other day at work, I had gotten into some trouble. I work in the bloodbank at the hospital and I had mistakenly issued the wrong unit of blood to a patient. It was an honest mistake but now I have to prove to my supervisor and staff that I am competent again. When talking to my supervisor, I had explained to him that we were just very busy and I had a lot on my plate at the moment and he was very understanding. He explained to me that mistakes happen every day and we are only human. I was  relieved when he had told me this. For now on I just have to be more aware. People make mistakes everyday but I just dont want to repeat my mistakes again. I prefer to learn from them and make myself a better employee.