Happened when I was a teen: Chest pain, nausea, weirdly tired, hard to breathe - all the oh so pleasant symptoms of a heart attack. The doc thoroughly checked me but couldn’t find anything wrong with my heart. After a couple of questions he told me to lie down on my stomach, ran his fingers up and down my spine and then gently pushed until something in my upper back went “pop” and the pain vanished almost immediatly.

Turns out I managed to “sit wrong” while studying and one of my vertebrae (or whatever they’re called) slightly dislodged, leading to a stiff, tense back that didn’t hurt per se, but messed up the “front” instead. On one hand, I was glad that there was nothing wrong with my heart (no issues with that thing ever since), but on the other hand I indeed felt trolled by my body. Why on earth my stupid back didn’t hurt if it was this obviously the culprit, is something I’ve never understood.