Don't know about meds. But anxiety-related chest pains were one of the first things that welcomed me into the world of mental health problems. I've dealt with them since 2008, and I too have gone to ER, multiple times, and been told it's stress.

I have a number of different types that affect me, and one of them has been the sharp pain on the inhale. Mine, however, have been at random, and don't always have a clear emotional root to trace back to. Still, general stress is usually the culprit.

I've actually gotten quite used to it. I used to curl up in a ball and despair, but I guess I've learned over the years that it isn't going to kill me, and I can kind of take it in stride. I can say with utter certainty that the extreme emotional reaction to the pain made it feel a lot worse. At least for me.

This isn't to say you shouldn't have it checked out, of course, since you only had it looked at once, a while ago. But I do get this too.