Re: TSH range source, and a few questions
Oh no, you don't. Not so fast.
What's the range for the FT4? That result is very low in the typical range of .8 - 1.8. It's important to know if your lab's range is narrower, though. Post it if you know it.
Your labs are not totally "normal". TSH of .66 when it was well over 3 only a few weeks ago might be due to the fluctuations of Hashimoto's disease. And TSH of only .66 wth low FT4 isn't "normal", either.
Yes, you say your antibody tests were negative, but those tests are fallible, false-negative, up to 20% of the time. Also, were both antibody tests done... Both Tg and TPO? Not every MD knows which ones to run and that both are important, not just one.
So... I wouldn't let a thyroid issue drop just yet, especially if that FT4 is as low in its range as yours would seem.