Came across your post which just about describes what I've been having the past 7 weeks. Off and on at random, though mine will last days at a time. So e days with chest soreness but always feels like someone's pressing in me. Low stress job so I'm convinced its not anixety. Xrays/scans came out normal / puffers /inhalers not working. I'm just clueless what's going on. At first I think it was cancer or I was dying. Now it seems to be the norm every other day. Any luck yet? Does yours come and go for long periods of time?