I'm currently 8w4d with my rainbow baby after a 11 week miscarriage and chemical pregnancy. Everything I read about tsh levels says it should be under 2.5 during pregnancy my obgyn claims they don't treat unless its over 4. Mine came back 3.9 and she said we will test again in the second trimester. I expressed my concers that I was worried that my tsh levels caused the first miscarriage since it was never tested by previous obgyn, she claims it has to be very high to cause a miscarriage and or problems. Should I be getting a second opinion? As I get closer to 11 weeks I can't help but worry. I do have an appointment and ultrasound on 1/21 and ill be 10w4d