Welcome caroline,
i've ended up in the emergency room a couple times this year with chest pain and they couldn't figure it out either. Well, I started doing research myself and came up with the answet, "costocondoititis".
It is an inflammation of the cartilage that joins the sterum and ribs. Sometimes it comes on gradually and sometime it comes on rapidly like a heartattack. I was the heart attack kind. You can go to "nationallibraryofmedicine.Org" and look this up. More importantly, keep this in your favorites so every time you get a new diagnoses or symptom you ccan look it up. This site will hook you up to john hopkins, mayo, cinncinaty clinic, medline and all the other health sites.
Good luck
mia
