This brings up a great point! It is difficult for some to get a proper dx.
Not to mention that a TSH alone is not sufficient in detecting all (any) Thyroid disorders. Also some doctors base normal values using the old ranges. It is way too common that some doctors do not test properly.
If you (a general you) are tested and still don't feel right I would see an endocrinologist or ask your primary to be specific about what they tested and give you a copy of the results.
This is a great basic website that lists the tests necessary to get a proper diagnosis.
http://thyroid.about.com/od/gettestedanddiagnosed/a/testdiagnose.htm