I have had extreme hyperthyroid symptoms and my T4 has been stuck at 24 (don't have ranges) with TSH 3.26 and FT3 at 3.0 for the past 9 weeks. I have Graves and had RAI 9 years ago and no trouble until 4 months ago.My synthroid was lowered 3 times and stopped entirely 2 weeks ago. Anyone have any ideas on what's going on and when I should see improvement? I am going crazy with all the symptoms, 9 weeks off work and no answers. I see my endo in 2 days. Could it be a conversion problem?