Hello,
I am sorry to hear about your symptoms. Not knowing why you are having symptoms like this can be quite scary. From experience I can tell you that symptoms like this are often very difficult to figure out why you may be having them. If I saw you in clinic, I would start with a history and phsyical exam, an
EKGAtrioventricular block, ekg tracing
Ecg
Exercise stress test, and possible an
echocardiogram if there was any questions about structural heart disease. Chest pains and shortness of breath is usually not heart disease in some one your age, but it is important to make sure that you aren't one of the few that does. I am not sure why they recommended iron unless blood tests showed that you were anemic -- and if you were, the more important question is why are you anemic.
If you don't think your doctor is answering your questions or is not giving your straight answers, it may be time to see another doctor.
I hope this helps. Thanks for posting.