Last night I woke up at about 1:30 in the morning, with this pain in my chest. It felt like my chest was constricting very tightly. Also, it felt like there were several long cuts on my chest, and it felt like they were burning. The pain was not extremely excruciating, but it was painful enough. It continued for about 20 minutes, and then just faded away, and then I fell asleep.

Any ideas why this happened?