The rule of thumb for FT4 is that it should be around midrange (50%), and yours is at 18%, so quite low. Rule of thumb for FT3 is upper half to upper third of range. Your FT3 looks good. TSH is high, indicating that your pituitary thinks your levels are too low.
With your low FT4 level, you'd probably benefit from meds. Has your doctor suggested treating you?
I'm not sure i understand what you mean by TSH levels fluctuating for the test. TSH tests are quite accurate, but TSH levels fluctuate considerably. Results can change by as much as 70% just with the time of day the blood was drawn.
Your FT4 is low, and that's consistent with your high TSH. However, your FT3 level looks good, which is not consistent.
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