It means your FT4 is low. But your FT3 has risen and could be acceptable. But we are all different and might need our levels higher or lower than each other.
Are you taking anything at all? Whether thyroid hormone or anything else.
Your February results show that your T4 and T3 are very low, despite your TSH not being elevated much, this is unusual in itself. For the March results, your T4 is still quite low, but there is a jump in T3. Sometimes, when a thyroid is failing, it can compensate for the lack of T4 by producing more T3 but the TSH appearing normal despite your T4 only being 10% through the range does not look right.
I think you should ask for a referral to an endocrinologist, preferably someone that may have experience in central hypothyroidism?
That is a long time for being unwell and having symptoms. The problem is, as long as everything is anywhere within those ranges, GPs are not interested and tell you all is normal and you should feel okay.
If you cannot get referred to an endocrinologist by your GP, could you perhaps see one privately? I have found a publication in the BMJ that lists the things that should be tested when looking for central hypothyroidism, maybe something to keep at hand, if you manage to get an appointment with an endocrinologist?
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