Hi I've posted on here before and people have been really helpful. Had bloods done through GP in early Aug and TSH was 1.4 and fT4 was 12.9 (range 12 -22).
Had bloods done again in Sept through private endo. TSH was 1.12, free T4 was 12.3 (same range) and free T3 was 3.4 (range of 3.1 - 5.8).
Went to see an ophthalmologist who said symptoms (dry, bloodshot eyes with swelling underneath) suggested thyroid eye disease. Had blood tests again in October. This time TSH was 1.38 and fT4 was 11.6 (range of 9.0 - 22). (Didn't do fT3 this time.) Got referred to second private endo who asked me to do bloods again(!). Just got told the results and told TSH was 0.98, fT4 was 10.5 (range of 9.0 -22), but free T3 was over 4 this time (waiting to be emailed results).
Does anyone know if your free T4 can fluctuate? I understand that TSH can be lower first thing in the morning before eating and this may explain the last result.
Should I be concerned by decreasing fT4?
I've mentioned secondary hypo to endos but they think unlikely given all other blood results appear normal. Is there anything else I should be insisting they check?