You need to consult a good psychologist
If your test result is norml and your physician is not doubtful, then why worry?
If not satisfied, find a physician of your choice and get his advice.
If required get another thyroid
test done under his advice.
Find out if there is another underlying cause.
You should talk to your physicn elaborately and know about the problem.
If he also tells the same thing as the one you mentioned, just forget it.
Being health conscious is good, not health anxious.