Past medical records are usually provided without charge as a professional courtesy to any physicians you are seeing. A friendly physician might be willing to request copies of your records for you as well. If records are requested from a clinic, the attending physicians will usually be informed about the request and will be given the opportunity to remove portions at their discretion. For example, a physician may have recorded that he or she suspects the possibility of a serious disease, but does not want to alarm the patient unnecessarily before a diagnosis is certain. When records are requested from a hospital it is less likely that the attending physician will be given the opportunity to review them and remove portions before the records are sent to the patient.
Modern medicine is full of uncertainties.
In many cases the diagnostic process is complex and there aren't always clear-cut guidelines about when to order which medical tests. When test results come back, there is much room for error in interpreting them. Every person's body is biochemically unique and it is impossible to always interpret test results accurately, even when good doctors are doing their best. By doing some of your own research you may not find specific answers, but you will be working toward a solution and perhaps will help rule out some possibilities in the process. Make sure tests are completed by asking for copies of the results.