Hi everyone ! I’ve been hypothyroid for 12 years and have always been very stable on levothyroxine.... until now. Two years ago I started having head pressure, headaches and dizziness and kept going back and forth to GP. GP checked my thyroid function at the time and said that is not the problem and said it must be sinuses. Fast forward to Christmas 2017 and I was also having trouble sleeping ( wired through the night) , shaking hands, etc.. doctor rechecked my thyroid function and found my tsh to be 0.02 !!!! His knee jerk response was to immediately lower my levothyroxine from 175 mcg per day to 150 mcg. He retested 8 weeks later and my tsh was 0.2. He immediately lowered levothyroxine to 125 mcg. I asked him if he could check my free T3/T4 and he agreed but scheduled test for 10th April. Meanwhile I ordered my own test through medichecks and these were my results::
Tsh 0.2
Free T4 21.3 (12-22.00)
Total T4 117.0. (59.00-154.00)
Free T3 3.8 (3.10-6.80)
Thyroglobulin antibody 31.4 (0.00-115.0)
Thyroid peroxidase antibodies 16.4 (0.00-34.0)
Active B12 90.5 (25.10-165.00)
Folate 2.94 (2.91-50.00)
CRP- high sensitivity 2.5 (0.00-5.00)
Ferritin 22.3 ( 13.00-150.00)
Okay ... my tsh still low.. my T4 high despite two unprecedented reductions in levothyroxine ( I’ve never needed a decrease in 12 years only ever had occasional increases) and my T3 looks lowish to me. Because I’ve been referred to endocrinologist for my previous/continuing issues with high bp spikes, head pressure and dizziness (whom I’m to see for first time on 19th April).. I’m wondering if this drastic sudden change in my thyroid status could be caused by some other issue in the endocrine system ? I find the combination of low tsh, high normal T4 and low T3 to be perplexing . Any advice welcome ! 😋