In 2005 I had my thyroid removed due to cancer (also took radioactive iodine). I am currently taking Levothyroxine and am 5.5 weeks pregnant. I had my TSH tested yesterday and my level was 0.34 and I am concerned because with my first pregnancy I had to increase my dose right away. But, according to my levels this time my dose can stay the same. Should I be worried that my TSH hasn't started creeping up, requiring more thryoid hormone replacement? Could this be a sign that there is something wrong with the preganancy?