Usually I don't feel comfortable of the idea of death, but today, after lunch, I tried to take a nap, and just before I could close my eyes, the idea of me vanishing and die set a strong fear in me, and my heart began to pound very hard, and I kind of panicked. So, I had to get up. This happens to me from time to time.

Is it normal to feel this way? Does anyone else feel the same way sometimes?