Iolite
You need to stet your FT3, FT4, RT3 and anti tpo and tg ab. To get a better picture of your thyroid.
You could have a conversion problem, causing your T4 to go to RT3 (which is unusable) or hashimotos and the antibodies attacking the thyroid. Http:\\www.stopthethyroidmadness.com has a lot of helpful information.