Hello - I recently had lab work done, and am waiting for a follow up to discuss with my endo. In the mean time, I'm looking for other insights, and would greatly appreciate any help. I have no thyroid tissue left after two doses of RAI (5 years ago), and after stable treatment on Levothyroxine since 2004, I recently started having many hypo symptoms. TSH in December was around 5.5, then down to 1.5 in January after an increase from .125 to .