Sis, thyroid screening masa pregnant is very standard, doctor check je to make sure your thyroid is working properly sebab it affects baby's development, especially otak dia nanti. Tak semestinya ada problem, just precaution lang, tapi kalau ada kelainan doctor boleh manage dengan medication yang safe untuk baby. A few of my mum friends all kena test jugak, so relax je, it's just part of antenatal care, bukan something yang scary! Tapi if you're worried about the results atau ada other symptoms, best to discuss in detail dengan doctor you sebab dia yang tahu your full health picture.