What is the explanation for the sensation of a lightning strike from my chest to my left foot?

years ago when I was going through some dark delusions, I experienced something like a lightning strike that passed inside my body from the left side of my chest (near the shoulder) to my left foot.

Even after years, that same spot on my chest still hurts, and occasionally the point on my left foot where that “lightning” struck also hurts. Whenever I feel guilt, that exact point on my chest always hurts. The pain in my foot is more variable and less frequent. It feels as if something that was supposed to be in the left side of my chest has fallen down into my foot.

I am aware of the concept of somatization, but no matter how much I research, I have never found a case exactly like mine. Do you have any information about what this might be?