I wonder if I had prematurely gone on thyroid hormone medication. The first TSH test I got done was back in 2013 after my first and worst bout of tonsillitis. Didn't get the full panel done though I wish I did, I was 5.30 (barely in range, out of top range 5.50). By the time I saw the ENT months later I was cleared as fine though have had recurrent tonsillitis ever since, finally will have a tonsillectomy done next month.
Anyways, after that first test, a few months later I got a full test done and TSH was 4.20 (0.30 - 5.50), T4 36% in range, T3 24% in range, TPOab in range (and in range ever since, TGab too). But I jumped the boat and went on NDT after seeing a naturopath. Fews month later TSH was suppressed and T4/T3 were just above mid-range.
But years later, last year, (I was refilling the same script for years lol) my test showed suppressed TSH but T4/T3 in third of range. GP took me off medication full stop (dumb idea, gained much weight, should've transitioned down).
Couple months later, off meds after years on NDT, T4 is 36%, T3 dipped just below range, TSH is 2.5. Doctor said T3 "is just below range you're fine." I disagreed but went along to address my low B12 and Vitamin D deficiency and see its effect.
4 months later, as vitamins improved, TSH was same around 2.5, T4 12% in range, T3 37% in range. I convinced the doctor to start me on Synthroid.
Now check this out, compared to that 12% T4 and 37% T3. After being put on Synthroid, T4/T3 fluctuated around third in range. TSH around 2. On 75mg T3 matched the 37%, T4 38%.
100mg T4 shot to 79%, T3 drops to 31%, TSH drops to 0.57. I felt more frequent bowels so dropped to 88mcg, after 4 weeks, TSH 0.66, but T4 43%, T3 32.5%.
Note that while T4 seemed to rise with Synthroid, T3 had actually been lower than the 37% (though T4 was 12% at that time) when I was off thyroid hormones for 6 months after years on NDT. I guess I'll find out what happens to my body after the tonsillectomy, if the recurrent tonsillitis has been affecting my body or it's just an annoyance in my throat. But I wonder that if I actually had euthyroid syndrome and prematurely went on thyroid hormones, if it screwed me up and now I need to take it for the rest of my life.