It's not "all in your head"... It's in your neck! I've had the "lump" feeling on and off for at least 15 years. Have it today, as a matter of fact. Stress is the diagnosis doctors are apparently taught to give when they don't want to treat a person, or when haven't got a clue about thyroid disease.
You clearly have an enlargement of some kind in your thyroid gland [which is why the "lump" feeling is there], or else he wouldn't have ordered the imaging tests. Plus, your TSH of 6 would be treated by an enlightened doctor who knows how to treat thyroid disease. Many, many people who have hypothyroidism have had to change doctors several times before they finally were taken seriously. I recommend you consider doing that if yours continues to prefer that you remain sick. You have symptoms and an elevated TSH. That's reason enough to be treated.
If you want to see how common the lump feeling is to thyroid sufferers, click this link to the search result of the board after I entered "lump throat" in the search bar:
[This message has been edited by midwest1 (edited 08-28-2003).]