Re: Always Freezing
Is your TSH is close to 1 and your FreeT3 and FreeT4 are in the upper 1/3 of the range? If your tests aren't near these levels, you get hyper from higher doses of Synthroid, and you're still having symptoms, then I'd also suggest getting tested for adrenal fatigue, which is very common among thyroid folks and can cause low temps.
While a 24-hour cortisol saliva test is really the best way of testing, most drs will only do a 1-time ACTH/serum cortisol test. This is like trying to see a movie and only watching the first 5 minutes of it.