I have had secondary hypothyroidism since age 17. After lots of bad endocrinologist experiences (not referred to endo when FT4 38 and FT3 1.6, put on thyroxine, then taken off by ends who didn't care how unwell I felt.... it goes on and on!!) and miss diagnosis it has been a working diagnosis that I have a hypothalamic pituitary axis issue suppressing my TSH response.
I have been treated on Levothyroxine since diagnosis (now 39) and currently taking 225mcg per day. Until recently taking 250mcg and have maintained normal range FT3 and FT4 but October 2017 suddenly FT4 shot up to 32 (T3 not done as moved into new area) reduced dose by 25mcg and restested 6 weeks later, FT4 31 and FT3 4.6.
GP refused to check antibodies and vit d but have has ferritin, folate, B12, FBC, Bone, LFT, CRP..... all "normal" but I can see that B12 and Haemoglobin is just above the lowest end of range.
Feel weird, hypo symptoms. Dizzy, disconnected, tired, worried about having the energy to get me though the day, aching muscles, nerve twinges and tingling sensation in feet, cold, weight gain, abdominal discomfort.....
Serum free T3 4.6 (3.1 -6.8)
Serum free T4 31 (12.0 - 22.0)
TSH 0.014 (0.27 - 4.2)
Serum vitamin B12 level 198 ng/L [180.0 - 866.0]
Serum ferritin level 57.9 ug/L [13.0 - 150.0]
Serum folate level 9.8 ng/mL [3.9 - 26.8]Full blood count
Haemoglobin concentration 126 g/L [120.0 - 160.0]
Thanks in advance