Hi. I have symptoms consistent with under active thyroid the worst being fatigue and brain fog (I also have a family history of under active thyroid and B12 deficiency). Doctor tested TSH (4.4), Free T4 (13) and B12 (402) and said they were normal. Having read advice here I got a Thyroid test by Medichecks to include testing for antibodies and the results are below with the ranges in brackets.
TSH 4.6 (0.27 - 4.20)
TT4 90.1 (59-154)
FT4 13.8 (12-22)
FT3 4.32 (3.1-6.8)
TGAB 55 (0-115)
TPOAB 176 (0-34iu/ml)
Medichecks said that I have slightly elevated TSH and TPOAB antibodies which can be consistent with Hashimotos and to discuss the results with my GP. However, what I can't understand is that my Free T3 level is fine so why would I be experiencing under active thyroid symptoms, as although my thyroid is under stress my body still has the amount of Free T3 which it actually needs?
I am loath to go back to my GP (who thinks its either chronic fatigue or depression) as I have a one doctor surgery where the GP has recently retired and so I will see a different locum each time. Also, if the TPOAB results were so important why would my GP not have tested these in the first place?
I am thinking of self medicating with a small does of 50 levothyroxine daily to see if my symptoms get better?