Hashimoto's but low TSH (and pregnant)

[bearbait]

Hi. I'm 13 weeks pregnant, this is my second pregnancy. I've never been diagnosed with any thyroid problems before. At 10 weeks my OB did routine bloodwork, discovered low TSH levels:
T4, total - 15.9 UG/DL
T3 uptake - 29.2 %
T4, free, calculated - 4.6 UG/DL
TSH - 0.01
They told me this indicated hyperthyroidism. So I went to an endocrinologist, who after doing a physical exam said she didn't think I had a problem, plus I didn't have any of the classic problems. However, she called today with my blood results, and said the TSH is still 0.01, the other numbers are better but one was still high, don't remeber which. BUT, she also said I tested antibody positive for underactive and that I had Hashimoto's thyroiditis. She didn't seem too concerned about any of this, said that sometimes people can fluctuate from hypo to hyper and back as their bodies try to overcompensate, plus sometimes women test hyper during the first trimester. I'm supposed to go back for more bloodwork in a few weeks, if the levels are still off then we will have to discuss treatment, as the baby can be effected.
Anyone else ever heard of having Hashimoto's with low TSH??

[megaloo]

I thought - and I could be wrong that the antibodies were the same but if they made you hyper then you had Graves and if they made you hypo you had Hashi. I could be wrong though.

I have heard of Hashi patients when they get pregnant either need more medication to compensate for the baby but some, and perhaps you are one of them, have a situation where the baby provides enough TSH for both and mother ends up hyper or normal. So, yes it is possible to be pregnant, have Hashi but have a low TSH.  It may be your baby's thyroid doing it.