First time I had chest pains, I woke up at 3 in the morning thinking I was having a heart attack. Pain to the left of my sternum going all the way from my front to my back. First time I had chest pain that actually felt like it was inside my body. I was panicking and trying to get out of bed but couldn't because of the pain. Ended up dragging myself out of bed sideways and collapsing on the floor.

The thing was, as soon as I was upright, the pain went away completely. I sat upright on the floor breathing properly again, then tried to go to bed again after about 15 mins. Pain returns with avengeance. It was only happening when my body was vertical. I figured it wasn't a heart attack, so I spent the rest of the night sleeping upright in a lounge chair.

It was a bad case of costochondritis (from stress and overwork) so much that one of my ribs had slightly dislocated.

Still, it was enough to scare me into getting healthier.