I fell earlier today going down the stairs. I landed on my back and went down about four steps. A couple of hours later I noticed that I had a pain in my chest. It feels like there is a big pill stuck in there. It hurts when I swallow and take a deep breath. Also, just randomly. I went and ran outside 2.5 miles earlier and it felt as if I needed to burp and my food was coming up, but it never did.