Pregnancy :: High TSH During 1st Trimester

Currently I'm 31 weeks pregnant.

I'm a hypothyroid patient since past 2 years and was on medication Thyroxine 50 mcg with regular GP.

However after I became pregnant and was tested for thyroid result were TSH 19 at week 7(thyroxin 100 mcg) and then TSH 12 at week 11 (thyroxine 125 mcg) adjusted by OB.

Thereafter I started referring to an endocrinologist who put me on thyronorm 150 mcg and my TSH was down to 2 at week 15. Subsequently monthly tests are showing normal range with regular follow-up and dosage adjustments.

From what I have been reading, I see that it should have been normalised in the first trimester itself as it affect's the baby's development. Can you please let me know if there's some tests that can be carried out asap (or new-born screenings) to know if baby has been negatively affected by this ? We want to ensure best possible care for baby once she is born so that it does not cause issues in later life.