I am going to see my private Endro. on Saturday & little confused about the latest blood test results. ( September tsh 4.03 Ft4 13. taking naturethriod.) She requested vitamin blood tests to be done.I did have issue with b12 ferritin & vit d, & told to stay off meds for 2weeks she also changed meds to levo. October 19th. I needed to have a blood test done & at the same time they done thyroid tests (To which I was unaware.)(Results.Oct.19th tsh 1.90. Ft4 15 on taking 2 weeks of 25mcg levo.) Nov 23rd. Tsh 2.69. Ft4 15 on taking 5 weeks of 50mcg ) The tsh gone up Ft 4 the same.