Shelley: yes, I've had thyroid testing done. My TSH is high, my T3 and T4 are right on the borderline of hypo. (At least they were 3 weeks ago.) My morning cortisol tested fine, still waiting results on 24 hour cortisol test.

The hashi's antibody tests were negative, but my doc says that isn't completely reliable. (At least w/ the version of the test I had.) So so far I don't know what's causing the low thyroid.

I was prescribed synthroid thryoid hormone, but haven't started taking it yet. Had read that some people w/ low B-12 had trouble tolerating it. Plus I just wanted to recover from the B-12 first, give my body a chance to heal from that, and then worry about the thyroid, as it's not even that low yet.

If anyone thinks I'm being silly and should start the thyroid meds now, please let me know.

Shelley, when you get chilled, does your oral temp actually drop? How low does it get?