Thyroid and Pregnancy - TSH < 2.5??

[Trommer]

Hello!

I am currently a delegate in the US and just found out that I am pregnant (week 6). It's still difficult for me to understand the health care system and knowing which doctors are really good and I received different opinions on my Lab results (my blood was drawn in week 4) - what should I do??

TSH                                             3.700 uIU/ML (0.450-4.500)
Triiodothyronine, Free, Serum    3.0 pg/mL (2.0-4.4)
T4, Free (Direct)                          1.12 ng/dL (0.82-1.77)

In the internet I keep finding the information that my TSH needs to be < 2.5...
There is very controversial information if the TSH value itself is sufficient to decide if I need to take any tablets or not...

History: I took some thyroid tablets  from 2010-2014 and stopped after a miscarriage. The doctors had very different opinions if I needed the tablets in the first place and I feel much better since I am not taking the tablets any more.
My results last autumn (approx. 1 year w/o tablets) were good. I got pregnant w/o tablets.

I would be glad to receive more information if I should take the tablets again...