I had my own ER story just the other day. I went in early in the morning due to excruciating abdominal pain (turned out to be a kidney stone).
The nurse was reviewing my medication and asked "Estrace, that's an estrogen isn't it?"
Me: "Yes"
Her: "Do you have a uterus?"
Me: "No, I'm a male to female transexual"
Her (angrily): "When we asked if you have any related medical conditions you should have mentioned that!"
Later on when I went for a CT scan I was asked if there was any chance that I was pregnant followed by when my last period was.