After three years of hell battling my GP, being told I had a pulled muscle/trapped nerve because there was nothing wrong with my thyroid I changed GP. Last Friday, for a trial period, he put me back on the Levo my previous GP took me off and agreed to another thyroid function test, this time early morning without food, even though my last test results a few weeks earlier were fine. Last test (early afternoon post breakfast and dinner) my TSH was 4.41, this test (08:00, no food) 9.51, that's more than double. There can be no argument now!
Funny, but when I mentioned it to my mum a couple of days ago (hypo for approx 40 years), she was surprised I didn't know, she's been having early morning, fasting tests for most of those 40 years because it affects the results. If her various doctors have known, why didn't mine? Many of my tests were last appointment of the day!