What was your (or someone close to you) biggest health scare?

Recently, I had a fair amount of bleeding from a certain area of my body, and it came and went, then came back again two more times. I went to the doctor, thinking it might be something insidious like cancer, but after much worrying the diagnosis was inflammation and breakage of delicate blood vessels within me, from an old injury. What was alarming was the amount of blood that came out of me, and the fact that it was painless and unexpected. The doctor said there’s still a chance that bleeding can occur again, but I’m relieved knowing now that it is nothing really that serious. Have you or a loved one ever encountered a big health scare? How did you deal with it, and what was the outcome?