I get feelings like that almost weekly (minus the crying). If they were heart attacks, I'd be long dead. They don't bother me that much though, so I really don't care.

They used to be more intense when I was younger, both in pain and frequency. They're just chest pains though, the doctors could never figure anything out. So either I'm fine with undiagnosable pain, or I'm chronically sick and I don't know it.