TSH and FT4 are good, I imagine, but you haven't put the ranges. But, the most important number is missing: FT3. If that is still too low, you will continue to have symptoms like extreme tiredness, because it's T3 that causes symptoms, not T4 or TSH.
No, the NHS doesn't like testing for T3, which is why so many people get it tested privately.
Not a good idea to increase T3 without seeing the level, but inability to increase dose is often due to nutritional deficiencies. Have you had your vit D, vit B12, folate and ferritin tested?
Plus important to test vitamin D, folate, ferritin and B12 at least once a year
Do you always get same brand levothyroxine at each prescription?
Bloods should be retested 6-8 weeks after each dose change or brand change in levothyroxine
How much T3 are you currently taking
For full Thyroid evaluation you need TSH, FT4 and FT3 plus both TPO and TG thyroid antibodies tested.
Very important to test vitamin D, folate, ferritin and B12 at least once year minimum
Recommended on here that all thyroid blood tests early morning, ideally before 9am last dose levothyroxine 24 hours before test
On T3 day before test split daily dose into 2 or 3 smaller doses, spread through the day at approx 8 hour intervals, taking last 1/2 or 1/3rd of daily dose 8-12 hours before test
Private tests are available as NHS currently rarely tests Ft3 or all relevant vitamins
List of private testing options and money off codes
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