I ended a young woman’s nursing career twenty years ago because I was too proud to double-check my own math. It is a heavy thing to carry, and honestly, it has been sitting on my chest like a lead weight ever since I retired and started cleaning out my old storage boxes.

Back in 1998, I was a senior nurse on the night shift. You know how it is. You get tired, you get arrogant, and you start thinking that your word is the law. We had a student nurse on the floor at the time. She was bright, young, and honestly, she had a lot of promise.

One night, the narcotics count did not match up. We were short two tablets of hydrocodone. I did the count myself, and I did it twice, or so I told myself. I felt the duty to report it. That is how the rules work in nursing. You report the discrepancy, you fill out the paperwork, and you move on.

I filled out the form that night. The student was dismissed from the program within the week. I didn’t even look back. I was the senior nurse, and my count was the final word. I didn’t question my own process, and I certainly didn’t question my own math.

I lived with that for two decades. I told myself I did the right thing for the hospital. I told myself that you have to be tough to keep the patients safe. But retirement has a funny way of making you look at your life through a different lens.

Three months ago, I was going through a cardboard box of files I had brought home from the hospital when I finally quit. I found a stack of old, yellowed log sheets from the winter of 1998. My hand was shaking when I picked them up.

I don’t know why I did it, but I started counting the columns again.

I counted the rows. Then I counted them again. I went down to the bottom of the page where I had signed my name in blue ink. I had circled the wrong total. It was a simple, stupid arithmetic error.

The two missing tablets weren’t missing. I had just miscounted the inventory, and in my exhaustion, I blamed the girl. My heart just about stopped right there in my living room. I stared at the paper until the ink seemed to swim before my eyes.

I spent the next three months tracking her down. It was not easy, but I had a few old contacts in the registry board who helped me trace her record. I found out she was living in Dayton. She had never finished her degree.

I drove the four hours to Dayton last Tuesday. My hands were gripping the steering wheel so hard my knuckles were white the whole way there. I didn’t know what I was going to say. I didn’t know if she would even talk to me.