I am a 23 year old female-nonsmoker/nondrinker/normal BMI who began having chest pain 4 months ago. I believe the pain was initially onset due to stress (I was switching jobs at the time). Stress is gone (went back to old job) but pain remains: blood test (hepatitis, h pylori), EKG, gall bladder/liver function, echo cardio/stress are all normal. I have been treated with arthritis medication for costocondritis and been perscribed both prilocec and nexium with no help. Pain is not constant and is not consistent (may be in am or pm; does not seem to appear after consuming certain food), doesn't worsen when I lie/breathe deeply, etc. Any clue?