I have a 17m old conceived via icsi ivf. Hypothyroidism was diagnosed during fertility investigations in 2011. During pregnancy I was told my tsh levels were normal when it later transpired they were not, according to reference values for each trimester. 2w ago I took a pregnancy test which was positive to our absolute amazement. (Daughter was born following 3 rounds of ivf and we've since had another round which was unsuccessful.) I had to delay the last ivf because tsh was 3.8 and needs to be <2.5 for conception / to prevent miscarriage. I increased my dose from 75 to 100mcg and tsh level was 0.66 within a few weeks. I asked for levels to be checked again when I was 4.5 weeks (unknowingly) pregnant and levels were 0.76. Today I asked for repeat prescription and confirmation I am on the correct dose. My gp said there are new guidelines and that I should increase my dose from 100 to 150mcg. However 0.76 is within the range for the first trimester. I'm worried I will be taking too much. GP said I only need further checks at 20 and 30-something weeks which she admitted after first saying I wouldn't require further tests while pregnant. I pushed her on this point as I was advised incorrectly prior to conception and during my last pregnancy by GPs at two different surgeries. SO my questions are:
Can anyone send me a link to the most recent advice?
Should ft3 and ft4 be tested as well as tsh?
What are the symptoms I should watch for if I am taking too much levothyroxine?
Thank you for your expertise.