Same subject, "not going to the Dr when you don't feel right can indeed kill you".
I lost my closest friend/coworker of 30 years to of all things a massive stroke at the age of 59. The underlying diagnosis was Atrial fibrillation or A-Fib. They are now running commercials on TV for this (drug co's). Anyway the heart is not beating properly, blood pools in the chamber, clots and then one day you get up out of bed and wham.
He was the picture of health. 6'3"and skinny as a rail. In good shape, didn't smoke or drink. He just didn't feel quite right and didn't say much or go to the Dr. in time. One day I was sitting in a meeting with him and the next day he was in the ER clinging to life and basically (brain) dead. One of the saddest things I have ever experienced in life.
Listen to "your" body, don't ignore things.